77500971 has 6 divisors (see below), whose sum is σ = 111945860. Its totient is φ = 51667308.

The previous prime is 77500967. The next prime is 77500987. The reversal of 77500971 is 17900577.

It is not a de Polignac number, because 77500971 - 2² = 77500967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77500931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4305601 + ... + 4305618.

Almost surely, 2^77500971 is an apocalyptic number.

77500971 is a deficient number, since it is larger than the sum of its proper divisors (34444889).

77500971 is a wasteful number, since it uses less digits than its factorization.

77500971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8611225 (or 8611222 counting only the distinct ones).

The product of its (nonzero) digits is 15435, while the sum is 36.

The square root of 77500971 is about 8803.4635797509. The cubic root of 77500971 is about 426.3527297449.

The spelling of 77500971 in words is "seventy-seven million, five hundred thousand, nine hundred seventy-one".