77023985 has 4 divisors (see below), whose sum is σ = 92428788. Its totient is φ = 61619184.

The previous prime is 77023963. The next prime is 77024009. The reversal of 77023985 is 58932077.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35331136 + 41692849 = 5944^2 + 6457^2 .

It is a cyclic number.

It is not a de Polignac number, because 77023985 - 2¹² = 77019889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7702394 + ... + 7702403.

It is an arithmetic number, because the mean of its divisors is an integer number (23107197).

Almost surely, 2^77023985 is an apocalyptic number.

It is an amenable number.

77023985 is a deficient number, since it is larger than the sum of its proper divisors (15404803).

77023985 is a wasteful number, since it uses less digits than its factorization.

77023985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15404802.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 77023985 is about 8776.3309531945. The cubic root of 77023985 is about 425.4762550365.

The spelling of 77023985 in words is "seventy-seven million, twenty-three thousand, nine hundred eighty-five".