869677421 has 4 divisors (see below), whose sum is σ = 869737344. Its totient is φ = 869617500.

The previous prime is 869677411. The next prime is 869677423. The reversal of 869677421 is 124776968.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 869677421 - 2¹⁸ = 869415277 is a prime.

It is a super-2 number, since 2×869677421² = 1512677633194422482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 869677421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869677423) 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, 7046 + ... + 42296.

It is an arithmetic number, because the mean of its divisors is an integer number (217434336).

Almost surely, 2^869677421 is an apocalyptic number.

It is an amenable number.

869677421 is a deficient number, since it is larger than the sum of its proper divisors (59923).

869677421 is a wasteful number, since it uses less digits than its factorization.

869677421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59922.

The product of its digits is 1016064, while the sum is 50.

The square root of 869677421 is about 29490.2936743600. The cubic root of 869677421 is about 954.5222690310.

The spelling of 869677421 in words is "eight hundred sixty-nine million, six hundred seventy-seven thousand, four hundred twenty-one".