42900491 has 2 divisors, whose sum is σ = 42900492. Its totient is φ = 42900490.

The previous prime is 42900449. The next prime is 42900511. The reversal of 42900491 is 19400924.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42900491 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (42903491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21450245 + 21450246.

It is an arithmetic number, because the mean of its divisors is an integer number (21450246).

Almost surely, 2^42900491 is an apocalyptic number.

42900491 is a deficient number, since it is larger than the sum of its proper divisors (1).

42900491 is an equidigital number, since it uses as much as digits as its factorization.

42900491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 42900491 is about 6549.8466394260. The cubic root of 42900491 is about 350.0693495234.

The spelling of 42900491 in words is "forty-two million, nine hundred thousand, four hundred ninety-one".