88639477 has 2 divisors, whose sum is σ = 88639478. Its totient is φ = 88639476.

The previous prime is 88639423. The next prime is 88639487. The reversal of 88639477 is 77493688.

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., 60824401 + 27815076 = 7799^2 + 5274^2 .

It is a cyclic number.

It is not a de Polignac number, because 88639477 - 2⁷ = 88639349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88639487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44319738 + 44319739.

It is an arithmetic number, because the mean of its divisors is an integer number (44319739).

Almost surely, 2^88639477 is an apocalyptic number.

It is an amenable number.

88639477 is a deficient number, since it is larger than the sum of its proper divisors (1).

88639477 is an equidigital number, since it uses as much as digits as its factorization.

88639477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 52.

The square root of 88639477 is about 9414.8540615349. The cubic root of 88639477 is about 445.8708310344.

The spelling of 88639477 in words is "eighty-eight million, six hundred thirty-nine thousand, four hundred seventy-seven".