42495977 has 2 divisors, whose sum is σ = 42495978. Its totient is φ = 42495976.

The previous prime is 42495949. The next prime is 42495979. The reversal of 42495977 is 77959424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32024281 + 10471696 = 5659^2 + 3236^2 .

It is a cyclic number.

It is not a de Polignac number, because 42495977 - 2¹² = 42491881 is a prime.

It is a super-2 number, since 2×42495977² = 3611816122369058, which contains 22 as substring.

Together with 42495979, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42495979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21247988 + 21247989.

It is an arithmetic number, because the mean of its divisors is an integer number (21247989).

Almost surely, 2^42495977 is an apocalyptic number.

It is an amenable number.

42495977 is a deficient number, since it is larger than the sum of its proper divisors (1).

42495977 is an equidigital number, since it uses as much as digits as its factorization.

42495977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 47.

The square root of 42495977 is about 6518.8938478855. The cubic root of 42495977 is about 348.9655907598.

The spelling of 42495977 in words is "forty-two million, four hundred ninety-five thousand, nine hundred seventy-seven".