78925393 has 4 divisors (see below), whose sum is σ = 78960820. Its totient is φ = 78889968.

The previous prime is 78925391. The next prime is 78925423. The reversal of 78925393 is 39352987.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5531904 + 73393489 = 2352^2 + 8567^2 .

It is a cyclic number.

It is not a de Polignac number, because 78925393 - 2¹ = 78925391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78925391) 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, 14130 + ... + 18907.

It is an arithmetic number, because the mean of its divisors is an integer number (19740205).

Almost surely, 2^78925393 is an apocalyptic number.

It is an amenable number.

78925393 is a deficient number, since it is larger than the sum of its proper divisors (35427).

78925393 is a wasteful number, since it uses less digits than its factorization.

78925393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35426.

The product of its digits is 408240, while the sum is 46.

The square root of 78925393 is about 8883.9964542992. The cubic root of 78925393 is about 428.9489255888.

The spelling of 78925393 in words is "seventy-eight million, nine hundred twenty-five thousand, three hundred ninety-three".