76529981 has 16 divisors (see below), whose sum is σ = 86125248. Its totient is φ = 67401600.

The previous prime is 76529963. The next prime is 76529983. The reversal of 76529981 is 18992567.

It is a cyclic number.

It is not a de Polignac number, because 76529981 - 2¹⁰ = 76528957 is a prime.

It is a super-2 number, since 2×76529981² = 11713675983720722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76529983) 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, 64211 + ... + 65391.

It is an arithmetic number, because the mean of its divisors is an integer number (5382828).

Almost surely, 2^76529981 is an apocalyptic number.

It is an amenable number.

76529981 is a deficient number, since it is larger than the sum of its proper divisors (9595267).

76529981 is a wasteful number, since it uses less digits than its factorization.

76529981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372.

The product of its digits is 272160, while the sum is 47.

The square root of 76529981 is about 8748.1415740716. The cubic root of 76529981 is about 424.5646864548.

The spelling of 76529981 in words is "seventy-six million, five hundred twenty-nine thousand, nine hundred eighty-one".