78975261 has 12 divisors (see below), whose sum is σ = 119035488. Its totient is φ = 50360904.

The previous prime is 78975223. The next prime is 78975263. The reversal of 78975261 is 16257987.

It is not a de Polignac number, because 78975261 - 2¹³ = 78967069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78975263) 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, 190555 + ... + 190968.

It is an arithmetic number, because the mean of its divisors is an integer number (9919624).

Almost surely, 2^78975261 is an apocalyptic number.

It is an amenable number.

78975261 is a deficient number, since it is larger than the sum of its proper divisors (40060227).

78975261 is a wasteful number, since it uses less digits than its factorization.

78975261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381552 (or 381549 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 78975261 is about 8886.8026308679. The cubic root of 78975261 is about 429.0392485323.

The spelling of 78975261 in words is "seventy-eight million, nine hundred seventy-five thousand, two hundred sixty-one".