1408613641 has 4 divisors (see below), whose sum is σ = 1438584192. Its totient is φ = 1378643092.

The previous prime is 1408613639. The next prime is 1408613663. The reversal of 1408613641 is 1463168041.

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: 1463168041 = 2131 ⋅686611.

It is a cyclic number.

It is not a de Polignac number, because 1408613641 - 2¹ = 1408613639 is a prime.

It is a super-2 number, since 2×1408613641² = 3968384779222553762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1408613597 and 1408613606.

It is not an unprimeable number, because it can be changed into a prime (1408613611) 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, 14985205 + ... + 14985298.

It is an arithmetic number, because the mean of its divisors is an integer number (359646048).

Almost surely, 2^1408613641 is an apocalyptic number.

It is an amenable number.

1408613641 is a deficient number, since it is larger than the sum of its proper divisors (29970551).

1408613641 is an equidigital number, since it uses as much as digits as its factorization.

1408613641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29970550.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 1408613641 is about 37531.5019816687. The cubic root of 1408613641 is about 1120.9785349596.

The spelling of 1408613641 in words is "one billion, four hundred eight million, six hundred thirteen thousand, six hundred forty-one".