76748731 has 4 divisors (see below), whose sum is σ = 76785192. Its totient is φ = 76712272.

The previous prime is 76748729. The next prime is 76748741. The reversal of 76748731 is 13784767.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13784767 = 97 ⋅142111.

It is a cyclic number.

It is not a de Polignac number, because 76748731 - 2¹ = 76748729 is a prime.

It is a super-2 number, since 2×76748731² = 11780735420220722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76748741) 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, 14866 + ... + 19351.

It is an arithmetic number, because the mean of its divisors is an integer number (19196298).

Almost surely, 2^76748731 is an apocalyptic number.

76748731 is a deficient number, since it is larger than the sum of its proper divisors (36461).

76748731 is a wasteful number, since it uses less digits than its factorization.

76748731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36460.

The product of its digits is 197568, while the sum is 43.

The square root of 76748731 is about 8760.6353080128. The cubic root of 76748731 is about 424.9688207807.

The spelling of 76748731 in words is "seventy-six million, seven hundred forty-eight thousand, seven hundred thirty-one".