77140847 has 12 divisors (see below), whose sum is σ = 89880336. Its totient is φ = 66013920.

The previous prime is 77140837. The next prime is 77140853. The reversal of 77140847 is 74804177.

It is not a de Polignac number, because 77140847 - 2²⁴ = 60363631 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 77140847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77140837) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51347 + ... + 52827.

It is an arithmetic number, because the mean of its divisors is an integer number (7490028).

Almost surely, 2^77140847 is an apocalyptic number.

77140847 is a deficient number, since it is larger than the sum of its proper divisors (12739489).

77140847 is a wasteful number, since it uses less digits than its factorization.

77140847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558 (or 2551 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 77140847 is about 8782.9862233753. The cubic root of 77140847 is about 425.6913260561.

The spelling of 77140847 in words is "seventy-seven million, one hundred forty thousand, eight hundred forty-seven".