88721077 has 2 divisors, whose sum is σ = 88721078. Its totient is φ = 88721076.

The previous prime is 88721071. The next prime is 88721081. The reversal of 88721077 is 77012788.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72148036 + 16573041 = 8494^2 + 4071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88721077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88721071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44360538 + 44360539.

It is an arithmetic number, because the mean of its divisors is an integer number (44360539).

Almost surely, 2^88721077 is an apocalyptic number.

It is an amenable number.

88721077 is a deficient number, since it is larger than the sum of its proper divisors (1).

88721077 is an equidigital number, since it uses as much as digits as its factorization.

88721077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43904, while the sum is 40.

The square root of 88721077 is about 9419.1866421682. The cubic root of 88721077 is about 446.0076094474.

The spelling of 88721077 in words is "eighty-eight million, seven hundred twenty-one thousand, seventy-seven".