42992087 has 2 divisors, whose sum is σ = 42992088. Its totient is φ = 42992086.

The previous prime is 42992069. The next prime is 42992143. The reversal of 42992087 is 78029924.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42992087 - 2⁶ = 42992023 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42992987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21496043 + 21496044.

It is an arithmetic number, because the mean of its divisors is an integer number (21496044).

Almost surely, 2^42992087 is an apocalyptic number.

42992087 is a deficient number, since it is larger than the sum of its proper divisors (1).

42992087 is an equidigital number, since it uses as much as digits as its factorization.

42992087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 42992087 is about 6556.8351359478. The cubic root of 42992087 is about 350.3183144964.

The spelling of 42992087 in words is "forty-two million, nine hundred ninety-two thousand, eighty-seven".