78961753 has 8 divisors (see below), whose sum is σ = 90038088. Its totient is φ = 68600064.

The previous prime is 78961741. The next prime is 78961759. The reversal of 78961753 is 35716987.

It can be written as a sum of positive squares in 4 ways, for example, as 1468944 + 77492809 = 1212^2 + 8803^2 .

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

It is not a de Polignac number, because 78961753 - 2⁵ = 78961721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78961759) 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, 178426 + ... + 178867.

It is an arithmetic number, because the mean of its divisors is an integer number (11254761).

Almost surely, 2^78961753 is an apocalyptic number.

It is an amenable number.

78961753 is a deficient number, since it is larger than the sum of its proper divisors (11076335).

78961753 is a wasteful number, since it uses less digits than its factorization.

78961753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357323.

The product of its digits is 317520, while the sum is 46.

The square root of 78961753 is about 8886.0425949913. The cubic root of 78961753 is about 429.0147860506.

The spelling of 78961753 in words is "seventy-eight million, nine hundred sixty-one thousand, seven hundred fifty-three".