78961953 has 16 divisors (see below), whose sum is σ = 121245696. Its totient is φ = 44775120.

The previous prime is 78961951. The next prime is 78962003. The reversal of 78961953 is 35916987.

It is not a de Polignac number, because 78961953 - 2¹ = 78961951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78961951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11601 + ... + 17102.

It is an arithmetic number, because the mean of its divisors is an integer number (7577856).

Almost surely, 2^78961953 is an apocalyptic number.

It is an amenable number.

78961953 is a deficient number, since it is larger than the sum of its proper divisors (42283743).

78961953 is a wasteful number, since it uses less digits than its factorization.

78961953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28844.

The product of its digits is 408240, while the sum is 48.

The square root of 78961953 is about 8886.0538485877. The cubic root of 78961953 is about 429.0151482635.

The spelling of 78961953 in words is "seventy-eight million, nine hundred sixty-one thousand, nine hundred fifty-three".