77133387 has 8 divisors (see below), whose sum is σ = 102933504. Its totient is φ = 51377768.

The previous prime is 77133349. The next prime is 77133389. The reversal of 77133387 is 78333177.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77133387 - 2¹⁵ = 77100619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77133389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6843 + ... + 14180.

It is an arithmetic number, because the mean of its divisors is an integer number (12866688).

Almost surely, 2^77133387 is an apocalyptic number.

77133387 is a deficient number, since it is larger than the sum of its proper divisors (25800117).

77133387 is a wasteful number, since it uses less digits than its factorization.

77133387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22249.

The product of its digits is 74088, while the sum is 39.

The square root of 77133387 is about 8782.5615283925. The cubic root of 77133387 is about 425.6776032802.

The spelling of 77133387 in words is "seventy-seven million, one hundred thirty-three thousand, three hundred eighty-seven".