42990165137 has 2 divisors, whose sum is σ = 42990165138. Its totient is φ = 42990165136.

The previous prime is 42990165079. The next prime is 42990165139. The reversal of 42990165137 is 73156109924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40065626896 + 2924538241 = 200164^2 + 54079^2 .

It is a cyclic number.

It is not a de Polignac number, because 42990165137 - 2¹⁸ = 42989902993 is a prime.

Together with 42990165139, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42990165091 and 42990165100.

It is not a weakly prime, because it can be changed into another prime (42990165139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21495082568 + 21495082569.

It is an arithmetic number, because the mean of its divisors is an integer number (21495082569).

Almost surely, 2^42990165137 is an apocalyptic number.

It is an amenable number.

42990165137 is a deficient number, since it is larger than the sum of its proper divisors (1).

42990165137 is an equidigital number, since it uses as much as digits as its factorization.

42990165137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 42990165137 in words is "forty-two billion, nine hundred ninety million, one hundred sixty-five thousand, one hundred thirty-seven".