77969469 has 4 divisors (see below), whose sum is σ = 103959296. Its totient is φ = 51979644.

The previous prime is 77969467. The next prime is 77969477. The reversal of 77969469 is 96496977.

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: 96496977 = 3 ⋅32165659.

It is not a de Polignac number, because 77969469 - 2¹ = 77969467 is a prime.

It is a super-2 number, since 2×77969469² = 12158476192283922, 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 (77969467) 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, 12994909 + ... + 12994914.

It is an arithmetic number, because the mean of its divisors is an integer number (25989824).

Almost surely, 2^77969469 is an apocalyptic number.

It is an amenable number.

77969469 is a deficient number, since it is larger than the sum of its proper divisors (25989827).

77969469 is a wasteful number, since it uses less digits than its factorization.

77969469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25989826.

The product of its digits is 5143824, while the sum is 57.

The square root of 77969469 is about 8830.0322196468. The cubic root of 77969469 is about 427.2101136544.

The spelling of 77969469 in words is "seventy-seven million, nine hundred sixty-nine thousand, four hundred sixty-nine".