465920138909 has 2 divisors, whose sum is σ = 465920138910. Its totient is φ = 465920138908.

The previous prime is 465920138857. The next prime is 465920138921. The reversal of 465920138909 is 909831029564.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383997105625 + 81923033284 = 619675^2 + 286222^2 .

It is a cyclic number.

It is not a de Polignac number, because 465920138909 - 2¹⁶ = 465920073373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (465920128909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232960069454 + 232960069455.

It is an arithmetic number, because the mean of its divisors is an integer number (232960069455).

Almost surely, 2^465920138909 is an apocalyptic number.

It is an amenable number.

465920138909 is a deficient number, since it is larger than the sum of its proper divisors (1).

465920138909 is an equidigital number, since it uses as much as digits as its factorization.

465920138909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4199040, while the sum is 56.

The spelling of 465920138909 in words is "four hundred sixty-five billion, nine hundred twenty million, one hundred thirty-eight thousand, nine hundred nine".