78752229 has 4 divisors (see below), whose sum is σ = 105002976. Its totient is φ = 52501484.

The previous prime is 78752209. The next prime is 78752231. The reversal of 78752229 is 92225787.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78752229 - 2⁷ = 78752101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78752209) 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, 13125369 + ... + 13125374.

It is an arithmetic number, because the mean of its divisors is an integer number (26250744).

Almost surely, 2^78752229 is an apocalyptic number.

It is an amenable number.

78752229 is a deficient number, since it is larger than the sum of its proper divisors (26250747).

78752229 is a wasteful number, since it uses less digits than its factorization.

78752229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26250746.

The product of its digits is 141120, while the sum is 42.

The square root of 78752229 is about 8874.2452636830. The cubic root of 78752229 is about 428.6349881765.

The spelling of 78752229 in words is "seventy-eight million, seven hundred fifty-two thousand, two hundred twenty-nine".