77939485 has 8 divisors (see below), whose sum is σ = 100721880. Its totient is φ = 57555264.

The previous prime is 77939473. The next prime is 77939503. The reversal of 77939485 is 58493977.

It can be written as a sum of positive squares in 4 ways, for example, as 41209 + 77898276 = 203^2 + 8826^2 .

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

It is not a de Polignac number, because 77939485 - 2⁷ = 77939357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 599470 + ... + 599599.

It is an arithmetic number, because the mean of its divisors is an integer number (12590235).

Almost surely, 2^77939485 is an apocalyptic number.

It is an amenable number.

77939485 is a deficient number, since it is larger than the sum of its proper divisors (22782395).

77939485 is a wasteful number, since it uses less digits than its factorization.

77939485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199087.

The product of its digits is 1905120, while the sum is 52.

The square root of 77939485 is about 8828.3342143351. The cubic root of 77939485 is about 427.1553438811.

The spelling of 77939485 in words is "seventy-seven million, nine hundred thirty-nine thousand, four hundred eighty-five".