77225077 has 2 divisors, whose sum is σ = 77225078. Its totient is φ = 77225076.

The previous prime is 77225069. The next prime is 77225111. The reversal of 77225077 is 77052277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52215076 + 25010001 = 7226^2 + 5001^2 .

It is a cyclic number.

It is not a de Polignac number, because 77225077 - 2³ = 77225069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77222077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38612538 + 38612539.

It is an arithmetic number, because the mean of its divisors is an integer number (38612539).

Almost surely, 2^77225077 is an apocalyptic number.

It is an amenable number.

77225077 is a deficient number, since it is larger than the sum of its proper divisors (1).

77225077 is an equidigital number, since it uses as much as digits as its factorization.

77225077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48020, while the sum is 37.

The square root of 77225077 is about 8787.7799813150. The cubic root of 77225077 is about 425.8462069842.

The spelling of 77225077 in words is "seventy-seven million, two hundred twenty-five thousand, seventy-seven".