42990504493 has 2 divisors, whose sum is σ = 42990504494. Its totient is φ = 42990504492.

The previous prime is 42990504463. The next prime is 42990504497. The reversal of 42990504493 is 39440509924.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24862036329 + 18128468164 = 157677^2 + 134642^2 .

It is a cyclic number.

It is not a de Polignac number, because 42990504493 - 2¹³ = 42990496301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42990504497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21495252246 + 21495252247.

It is an arithmetic number, because the mean of its divisors is an integer number (21495252247).

Almost surely, 2^42990504493 is an apocalyptic number.

It is an amenable number.

42990504493 is a deficient number, since it is larger than the sum of its proper divisors (1).

42990504493 is an equidigital number, since it uses as much as digits as its factorization.

42990504493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 42990504493 in words is "forty-two billion, nine hundred ninety million, five hundred four thousand, four hundred ninety-three".