77972122 has 8 divisors (see below), whose sum is σ = 117167616. Its totient is φ = 38916252.

The previous prime is 77972087. The next prime is 77972123. The reversal of 77972122 is 22127977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (77972123) 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, 33498 + ... + 35749.

It is an arithmetic number, because the mean of its divisors is an integer number (14645952).

Almost surely, 2^77972122 is an apocalyptic number.

77972122 is a deficient number, since it is larger than the sum of its proper divisors (39195494).

77972122 is a wasteful number, since it uses less digits than its factorization.

77972122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69812.

The product of its digits is 24696, while the sum is 37.

The square root of 77972122 is about 8830.1824443213. The cubic root of 77972122 is about 427.2149590363.

The spelling of 77972122 in words is "seventy-seven million, nine hundred seventy-two thousand, one hundred twenty-two".