77220953 has 16 divisors (see below), whose sum is σ = 84271104. Its totient is φ = 70479360.

The previous prime is 77220929. The next prime is 77221007. The reversal of 77220953 is 35902277.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77220953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77220653) 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, 101093 + ... + 101853.

It is an arithmetic number, because the mean of its divisors is an integer number (5266944).

Almost surely, 2^77220953 is an apocalyptic number.

It is an amenable number.

77220953 is a deficient number, since it is larger than the sum of its proper divisors (7050151).

77220953 is a wasteful number, since it uses less digits than its factorization.

77220953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 77220953 is about 8787.5453341647. The cubic root of 77220953 is about 425.8386264543.

The spelling of 77220953 in words is "seventy-seven million, two hundred twenty thousand, nine hundred fifty-three".