77221359 has 6 divisors (see below), whose sum is σ = 111541976. Its totient is φ = 51480900.

The previous prime is 77221351. The next prime is 77221367. The reversal of 77221359 is 95312277.

It is an interprime number because it is at equal distance from previous prime (77221351) and next prime (77221367).

It is not a de Polignac number, because 77221359 - 2³ = 77221351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77221351) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4290067 + ... + 4290084.

Almost surely, 2^77221359 is an apocalyptic number.

77221359 is a deficient number, since it is larger than the sum of its proper divisors (34320617).

77221359 is a wasteful number, since it uses less digits than its factorization.

77221359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8580157 (or 8580154 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 77221359 is about 8787.5684350109. The cubic root of 77221359 is about 425.8393727551.

The spelling of 77221359 in words is "seventy-seven million, two hundred twenty-one thousand, three hundred fifty-nine".