42990587 has 2 divisors, whose sum is σ = 42990588. Its totient is φ = 42990586.

The previous prime is 42990553. The next prime is 42990593. The reversal of 42990587 is 78509924.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42990587 - 2¹⁴ = 42974203 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42990517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21495293 + 21495294.

It is an arithmetic number, because the mean of its divisors is an integer number (21495294).

Almost surely, 2^42990587 is an apocalyptic number.

42990587 is a deficient number, since it is larger than the sum of its proper divisors (1).

42990587 is an equidigital number, since it uses as much as digits as its factorization.

42990587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 42990587 is about 6556.7207504972. The cubic root of 42990587 is about 350.3142402305.

The spelling of 42990587 in words is "forty-two million, nine hundred ninety thousand, five hundred eighty-seven".