77022961 has 4 divisors (see below), whose sum is σ = 77286132. Its totient is φ = 76759792.

The previous prime is 77022949. The next prime is 77022973. The reversal of 77022961 is 16922077.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (77022949) and next prime (77022973).

It can be written as a sum of positive squares in 2 ways, for example, as 35343025 + 41679936 = 5945^2 + 6456^2 .

It is a cyclic number.

It is not a de Polignac number, because 77022961 - 2¹⁷ = 76891889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77022901) 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, 131146 + ... + 131731.

It is an arithmetic number, because the mean of its divisors is an integer number (19321533).

Almost surely, 2^77022961 is an apocalyptic number.

It is an amenable number.

77022961 is a deficient number, since it is larger than the sum of its proper divisors (263171).

77022961 is a wasteful number, since it uses less digits than its factorization.

77022961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263170.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 77022961 is about 8776.2726142708. The cubic root of 77022961 is about 425.4743695216.

The spelling of 77022961 in words is "seventy-seven million, twenty-two thousand, nine hundred sixty-one".