877072421 has 4 divisors (see below), whose sum is σ = 878066592. Its totient is φ = 876078252.

The previous prime is 877072403. The next prime is 877072447. The reversal of 877072421 is 124270778.

It is a happy number.

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: 124270778 = 2 ⋅62135389.

It is a cyclic number.

It is not a de Polignac number, because 877072421 - 2²² = 872878117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (877072321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495761 + ... + 497526.

It is an arithmetic number, because the mean of its divisors is an integer number (219516648).

Almost surely, 2^877072421 is an apocalyptic number.

It is an amenable number.

877072421 is a deficient number, since it is larger than the sum of its proper divisors (994171).

877072421 is an equidigital number, since it uses as much as digits as its factorization.

877072421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994170.

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 877072421 is about 29615.4085063840. The cubic root of 877072421 is about 957.2201195764.

The spelling of 877072421 in words is "eight hundred seventy-seven million, seventy-two thousand, four hundred twenty-one".