209130372903457 has 2 divisors, whose sum is σ = 209130372903458. Its totient is φ = 209130372903456.

The previous prime is 209130372903379. The next prime is 209130372903467. The reversal of 209130372903457 is 754309273031902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120231422370081 + 88898950533376 = 10965009^2 + 9428624^2 .

It is a cyclic number.

It is not a de Polignac number, because 209130372903457 - 2²³ = 209130364514849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 209130372903398 and 209130372903407.

It is not a weakly prime, because it can be changed into another prime (209130372903467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104565186451728 + 104565186451729.

It is an arithmetic number, because the mean of its divisors is an integer number (104565186451729).

Almost surely, 2^{209130372903457} is an apocalyptic number.

It is an amenable number.

209130372903457 is a deficient number, since it is larger than the sum of its proper divisors (1).

209130372903457 is an equidigital number, since it uses as much as digits as its factorization.

209130372903457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8573040, while the sum is 55.

The spelling of 209130372903457 in words is "two hundred nine trillion, one hundred thirty billion, three hundred seventy-two million, nine hundred three thousand, four hundred fifty-seven".