76243691 has 6 divisors (see below), whose sum is σ = 80992740. Its totient is φ = 71758496.

The previous prime is 76243681. The next prime is 76243709. The reversal of 76243691 is 19634267.

It is not a de Polignac number, because 76243691 - 2¹⁰ = 76242667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76243681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 131621 + ... + 132198.

It is an arithmetic number, because the mean of its divisors is an integer number (13498790).

Almost surely, 2^76243691 is an apocalyptic number.

76243691 is a deficient number, since it is larger than the sum of its proper divisors (4749049).

76243691 is a wasteful number, since it uses less digits than its factorization.

76243691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263853 (or 263836 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 76243691 is about 8731.7633385245. The cubic root of 76243691 is about 424.0346087657.

The spelling of 76243691 in words is "seventy-six million, two hundred forty-three thousand, six hundred ninety-one".