78922697 has 16 divisors (see below), whose sum is σ = 91483392. Its totient is φ = 66692160.

The previous prime is 78922691. The next prime is 78922763. The reversal of 78922697 is 79622987.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 78922697 - 2⁶ = 78922633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78922691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211403 + ... + 211775.

It is an arithmetic number, because the mean of its divisors is an integer number (5717712).

Almost surely, 2^78922697 is an apocalyptic number.

It is an amenable number.

78922697 is a deficient number, since it is larger than the sum of its proper divisors (12560695).

78922697 is a wasteful number, since it uses less digits than its factorization.

78922697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728.

The product of its digits is 762048, while the sum is 50.

The square root of 78922697 is about 8883.8447194894. The cubic root of 78922697 is about 428.9440414004.

The spelling of 78922697 in words is "seventy-eight million, nine hundred twenty-two thousand, six hundred ninety-seven".