78752051 has 4 divisors (see below), whose sum is σ = 90002352. Its totient is φ = 67501752.

The previous prime is 78752027. The next prime is 78752053. The reversal of 78752051 is 15025787.

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

It is a cyclic number.

It is not a de Polignac number, because 78752051 - 2⁶ = 78751987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78752053) 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 3 ways as a sum of consecutive naturals, for example, 5625140 + ... + 5625153.

It is an arithmetic number, because the mean of its divisors is an integer number (22500588).

Almost surely, 2^78752051 is an apocalyptic number.

78752051 is a deficient number, since it is larger than the sum of its proper divisors (11250301).

78752051 is a wasteful number, since it uses less digits than its factorization.

78752051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11250300.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 78752051 is about 8874.2352346554. The cubic root of 78752051 is about 428.6346652350.

The spelling of 78752051 in words is "seventy-eight million, seven hundred fifty-two thousand, fifty-one".