42902891 has 2 divisors, whose sum is σ = 42902892. Its totient is φ = 42902890.

The previous prime is 42902887. The next prime is 42902929. The reversal of 42902891 is 19820924.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42902891 - 2² = 42902887 is a prime.

It is not a weakly prime, because it can be changed into another prime (42902191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21451445 + 21451446.

It is an arithmetic number, because the mean of its divisors is an integer number (21451446).

Almost surely, 2^42902891 is an apocalyptic number.

42902891 is a deficient number, since it is larger than the sum of its proper divisors (1).

42902891 is an equidigital number, since it uses as much as digits as its factorization.

42902891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 42902891 is about 6550.0298472602. The cubic root of 42902891 is about 350.0758774267.

The spelling of 42902891 in words is "forty-two million, nine hundred two thousand, eight hundred ninety-one".