76840929 has 36 divisors (see below), whose sum is σ = 125048196. Its totient is φ = 45408000.

The previous prime is 76840927. The next prime is 76840931. The reversal of 76840929 is 92904867.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (76840927) and next prime (76840931).

It can be written as a sum of positive squares in 2 ways, for example, as 26501904 + 50339025 = 5148^2 + 7095^2 .

It is not a de Polignac number, because 76840929 - 2¹ = 76840927 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76840927) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 43789 + ... + 45509.

It is an arithmetic number, because the mean of its divisors is an integer number (3473561).

Almost surely, 2^76840929 is an apocalyptic number.

It is an amenable number.

76840929 is a deficient number, since it is larger than the sum of its proper divisors (48207267).

76840929 is a wasteful number, since it uses less digits than its factorization.

76840929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790 (or 1776 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 76840929 is about 8765.8957899350. The cubic root of 76840929 is about 425.1389239031.

The spelling of 76840929 in words is "seventy-six million, eight hundred forty thousand, nine hundred twenty-nine".