76969915 has 48 divisors (see below), whose sum is σ = 108591840. Its totient is φ = 52236800.

The previous prime is 76969913. The next prime is 76969927. The reversal of 76969915 is 51996967.

76969915 = 9² + 10² + ... + 613².

It is not a de Polignac number, because 76969915 - 2¹ = 76969913 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76969913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 719292 + ... + 719398.

It is an arithmetic number, because the mean of its divisors is an integer number (2262330).

Almost surely, 2^76969915 is an apocalyptic number.

76969915 is the 4387-th decagonal number.

76969915 is a deficient number, since it is larger than the sum of its proper divisors (31621925).

76969915 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (76969914) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (204).

76969915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 193 counting only the distinct ones).

The product of its digits is 918540, while the sum is 52.

The square root of 76969915 is about 8773.2499679423. The cubic root of 76969915 is about 425.3766718292.

The spelling of 76969915 in words is "seventy-six million, nine hundred sixty-nine thousand, nine hundred fifteen".