42988177 has 2 divisors, whose sum is σ = 42988178. Its totient is φ = 42988176.

The previous prime is 42988171. The next prime is 42988181. The reversal of 42988177 is 77188924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40844881 + 2143296 = 6391^2 + 1464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42988177 is a prime.

It is not a weakly prime, because it can be changed into another prime (42988171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21494088 + 21494089.

It is an arithmetic number, because the mean of its divisors is an integer number (21494089).

Almost surely, 2^42988177 is an apocalyptic number.

It is an amenable number.

42988177 is a deficient number, since it is larger than the sum of its proper divisors (1).

42988177 is an equidigital number, since it uses as much as digits as its factorization.

42988177 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 46.

The square root of 42988177 is about 6556.5369670276. The cubic root of 42988177 is about 350.3076940448.

The spelling of 42988177 in words is "forty-two million, nine hundred eighty-eight thousand, one hundred seventy-seven".