78742601 has 4 divisors (see below), whose sum is σ = 89991552. Its totient is φ = 67493652.

The previous prime is 78742597. The next prime is 78742607. The reversal of 78742601 is 10624787.

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 78742601 - 2² = 78742597 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78742607) 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, 5624465 + ... + 5624478.

It is an arithmetic number, because the mean of its divisors is an integer number (22497888).

Almost surely, 2^78742601 is an apocalyptic number.

It is an amenable number.

78742601 is a deficient number, since it is larger than the sum of its proper divisors (11248951).

78742601 is a wasteful number, since it uses less digits than its factorization.

78742601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11248950.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 78742601 is about 8873.7027784347. The cubic root of 78742601 is about 428.6175196091.

The spelling of 78742601 in words is "seventy-eight million, seven hundred forty-two thousand, six hundred one".