76639469 has 8 divisors (see below), whose sum is σ = 80387328. Its totient is φ = 72979920.

The previous prime is 76639463. The next prime is 76639481. The reversal of 76639469 is 96493667.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76639469 - 2¹² = 76635373 is a prime.

It is a super-2 number, since 2×76639469² = 11747216417203922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76639463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20297 + ... + 23774.

It is an arithmetic number, because the mean of its divisors is an integer number (10048416).

Almost surely, 2^76639469 is an apocalyptic number.

It is an amenable number.

76639469 is a deficient number, since it is larger than the sum of its proper divisors (3747859).

76639469 is a wasteful number, since it uses less digits than its factorization.

76639469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44155.

The product of its digits is 1469664, while the sum is 50.

The square root of 76639469 is about 8754.3971237316. The cubic root of 76639469 is about 424.7670585078.

The spelling of 76639469 in words is "seventy-six million, six hundred thirty-nine thousand, four hundred sixty-nine".