78969725 has 12 divisors (see below), whose sum is σ = 98101236. Its totient is φ = 63060480.

The previous prime is 78969713. The next prime is 78969727. The reversal of 78969725 is 52796987.

It can be written as a sum of positive squares in 6 ways, for example, as 14295961 + 64673764 = 3781^2 + 8042^2 .

It is not a de Polignac number, because 78969725 - 2⁸ = 78969469 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 (78969727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12749 + ... + 17901.

It is an arithmetic number, because the mean of its divisors is an integer number (8175103).

Almost surely, 2^78969725 is an apocalyptic number.

It is an amenable number.

78969725 is a deficient number, since it is larger than the sum of its proper divisors (19131511).

78969725 is a wasteful number, since it uses less digits than its factorization.

78969725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5776 (or 5771 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 53.

The square root of 78969725 is about 8886.4911523053. The cubic root of 78969725 is about 429.0292233811.

The spelling of 78969725 in words is "seventy-eight million, nine hundred sixty-nine thousand, seven hundred twenty-five".