78959501 has 4 divisors (see below), whose sum is σ = 80041212. Its totient is φ = 77877792.

The previous prime is 78959471. The next prime is 78959519. The reversal of 78959501 is 10595987.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10595987 = 59 ⋅179593.

It can be written as a sum of positive squares in 2 ways, for example, as 66814276 + 12145225 = 8174^2 + 3485^2 .

It is a cyclic number.

It is not a de Polignac number, because 78959501 - 2¹⁸ = 78697357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78959521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540746 + ... + 540891.

It is an arithmetic number, because the mean of its divisors is an integer number (20010303).

Almost surely, 2^78959501 is an apocalyptic number.

It is an amenable number.

78959501 is a deficient number, since it is larger than the sum of its proper divisors (1081711).

78959501 is a wasteful number, since it uses less digits than its factorization.

78959501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081710.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 78959501 is about 8885.9158785125. The cubic root of 78959501 is about 429.0107074917.

The spelling of 78959501 in words is "seventy-eight million, nine hundred fifty-nine thousand, five hundred one".