77542971 has 24 divisors (see below), whose sum is σ = 119636160. Its totient is φ = 44518320.

The previous prime is 77542963. The next prime is 77542987. The reversal of 77542971 is 17924577.

It is not a de Polignac number, because 77542971 - 2³ = 77542963 is a prime.

It is a super-3 number, since 3×77542971³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (77542901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1276 + ... + 12518.

It is an arithmetic number, because the mean of its divisors is an integer number (4984840).

Almost surely, 2^77542971 is an apocalyptic number.

77542971 is a deficient number, since it is larger than the sum of its proper divisors (42093189).

77542971 is a wasteful number, since it uses less digits than its factorization.

77542971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11287 (or 11276 counting only the distinct ones).

The product of its digits is 123480, while the sum is 42.

The square root of 77542971 is about 8805.8486814162. The cubic root of 77542971 is about 426.4297334291.

The spelling of 77542971 in words is "seventy-seven million, five hundred forty-two thousand, nine hundred seventy-one".