77957893 has 16 divisors (see below), whose sum is σ = 88688320. Its totient is φ = 67931136.

The previous prime is 77957881. The next prime is 77957897. The reversal of 77957893 is 39875977.

It is not a de Polignac number, because 77957893 - 2¹³ = 77949701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77957897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134821 + ... + 135397.

It is an arithmetic number, because the mean of its divisors is an integer number (5543020).

Almost surely, 2^77957893 is an apocalyptic number.

It is an amenable number.

77957893 is a deficient number, since it is larger than the sum of its proper divisors (10730427).

77957893 is a wasteful number, since it uses less digits than its factorization.

77957893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156.

The product of its digits is 3333960, while the sum is 55.

The square root of 77957893 is about 8829.3767050681. The cubic root of 77957893 is about 427.1889702115.

The spelling of 77957893 in words is "seventy-seven million, nine hundred fifty-seven thousand, eight hundred ninety-three".