77242975 has 24 divisors (see below), whose sum is σ = 98899920. Its totient is φ = 59808000.

The previous prime is 77242973. The next prime is 77242981. The reversal of 77242975 is 57924277.

It is not a de Polignac number, because 77242975 - 2¹ = 77242973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77242973) 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, 183265 + ... + 183685.

It is an arithmetic number, because the mean of its divisors is an integer number (4120830).

Almost surely, 2^77242975 is an apocalyptic number.

77242975 is a deficient number, since it is larger than the sum of its proper divisors (21656945).

77242975 is a wasteful number, since it uses less digits than its factorization.

77242975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 646 counting only the distinct ones).

The product of its digits is 246960, while the sum is 43.

The square root of 77242975 is about 8788.7982682503. The cubic root of 77242975 is about 425.8791030631.

The spelling of 77242975 in words is "seventy-seven million, two hundred forty-two thousand, nine hundred seventy-five".