42604691 has 2 divisors, whose sum is σ = 42604692. Its totient is φ = 42604690.

The previous prime is 42604673. The next prime is 42604693. The reversal of 42604691 is 19640624.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42604691 - 2²² = 38410387 is a prime.

Together with 42604693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42604693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21302345 + 21302346.

It is an arithmetic number, because the mean of its divisors is an integer number (21302346).

Almost surely, 2^42604691 is an apocalyptic number.

42604691 is a deficient number, since it is larger than the sum of its proper divisors (1).

42604691 is an equidigital number, since it uses as much as digits as its factorization.

42604691 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 32.

The square root of 42604691 is about 6527.2268996872. The cubic root of 42604691 is about 349.2629141227.

The spelling of 42604691 in words is "forty-two million, six hundred four thousand, six hundred ninety-one".