42097877 has 2 divisors, whose sum is σ = 42097878. Its totient is φ = 42097876.

The previous prime is 42097841. The next prime is 42097883. The reversal of 42097877 is 77879024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21613201 + 20484676 = 4649^2 + 4526^2 .

It is a cyclic number.

It is not a de Polignac number, because 42097877 - 2⁶ = 42097813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42097807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21048938 + 21048939.

It is an arithmetic number, because the mean of its divisors is an integer number (21048939).

Almost surely, 2^42097877 is an apocalyptic number.

It is an amenable number.

42097877 is a deficient number, since it is larger than the sum of its proper divisors (1).

42097877 is an equidigital number, since it uses as much as digits as its factorization.

42097877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 42097877 is about 6488.2876785790. The cubic root of 42097877 is about 347.8724733107.

The spelling of 42097877 in words is "forty-two million, ninety-seven thousand, eight hundred seventy-seven".