1003677421 has 4 divisors (see below), whose sum is σ = 1036054144. Its totient is φ = 971300700.

The previous prime is 1003677419. The next prime is 1003677449. The reversal of 1003677421 is 1247763001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1247763001 = 89 ⋅14019809.

It is a cyclic number.

It is not a de Polignac number, because 1003677421 - 2¹ = 1003677419 is a prime.

It is a super-2 number, since 2×1003677421² = 2014736730850422482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 32376691 = 1003677421 / (1 + 0 + 0 + 3 + 6 + 7 + 7 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003677401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16188315 + ... + 16188376.

It is an arithmetic number, because the mean of its divisors is an integer number (259013536).

Almost surely, 2^1003677421 is an apocalyptic number.

It is an amenable number.

1003677421 is a deficient number, since it is larger than the sum of its proper divisors (32376723).

1003677421 is an equidigital number, since it uses as much as digits as its factorization.

1003677421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32376722.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 1003677421 is about 31680.8683750935. The cubic root of 1003677421 is about 1001.2243074595.

The spelling of 1003677421 in words is "one billion, three million, six hundred seventy-seven thousand, four hundred twenty-one".