78943225 has 9 divisors (see below), whose sum is σ = 97944717. Its totient is φ = 63119040.

The previous prime is 78943201. The next prime is 78943229. The reversal of 78943225 is 52234987.

The square root of 78943225 is 8885.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1432809 + 77510416 = 1197^2 + 8804^2 .

It is not a de Polignac number, because 78943225 - 2⁷ = 78943097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78943229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 43537 + ... + 45313.

Almost surely, 2^78943225 is an apocalyptic number.

78943225 is the 8885-th square number.

78943225 is the 4443-rd centered octagonal number.

It is an amenable number.

78943225 is a deficient number, since it is larger than the sum of its proper divisors (19001492).

78943225 is an frugal number, since it uses more digits than its factorization.

78943225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3564 (or 1782 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The cubic root of 78943225 is about 428.9812279990.

The spelling of 78943225 in words is "seventy-eight million, nine hundred forty-three thousand, two hundred twenty-five".