77940801 has 12 divisors (see below), whose sum is σ = 119203812. Its totient is φ = 48903936.

The previous prime is 77940799. The next prime is 77940823. The reversal of 77940801 is 10804977.

It can be written as a sum of positive squares in 2 ways, for example, as 55130625 + 22810176 = 7425^2 + 4776^2 .

It is not a de Polignac number, because 77940801 - 2¹ = 77940799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77940881) 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, 254556 + ... + 254861.

It is an arithmetic number, because the mean of its divisors is an integer number (9933651).

Almost surely, 2^77940801 is an apocalyptic number.

It is an amenable number.

77940801 is a deficient number, since it is larger than the sum of its proper divisors (41263011).

77940801 is a wasteful number, since it uses less digits than its factorization.

77940801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509440 (or 509437 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 77940801 is about 8828.4087467674. The cubic root of 77940801 is about 427.1577480253.

The spelling of 77940801 in words is "seventy-seven million, nine hundred forty thousand, eight hundred one".