76436731 has 16 divisors (see below), whose sum is σ = 90769408. Its totient is φ = 62985600.

The previous prime is 76436729. The next prime is 76436761. The reversal of 76436731 is 13763467.

It is a 7-Lehmer number, since φ(76436731) divides (76436731-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 76436731 - 2¹ = 76436729 is a prime.

It is a super-2 number, since 2×76436731² = 11685147691932722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76436761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34291 + ... + 36451.

It is an arithmetic number, because the mean of its divisors is an integer number (5673088).

Almost surely, 2^76436731 is an apocalyptic number.

76436731 is a deficient number, since it is larger than the sum of its proper divisors (14332677).

76436731 is a wasteful number, since it uses less digits than its factorization.

76436731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362.

The product of its digits is 63504, while the sum is 37.

The square root of 76436731 is about 8742.8102461394. The cubic root of 76436731 is about 424.3921756406.

The spelling of 76436731 in words is "seventy-six million, four hundred thirty-six thousand, seven hundred thirty-one".