375138197309 has 2 divisors, whose sum is σ = 375138197310. Its totient is φ = 375138197308.

The previous prime is 375138197267. The next prime is 375138197323. The reversal of 375138197309 is 903791831573.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 365988700900 + 9149496409 = 604970^2 + 95653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-375138197309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (375138197359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187569098654 + 187569098655.

It is an arithmetic number, because the mean of its divisors is an integer number (187569098655).

Almost surely, 2^375138197309 is an apocalyptic number.

It is an amenable number.

375138197309 is a deficient number, since it is larger than the sum of its proper divisors (1).

375138197309 is an equidigital number, since it uses as much as digits as its factorization.

375138197309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4286520, while the sum is 56.

The spelling of 375138197309 in words is "three hundred seventy-five billion, one hundred thirty-eight million, one hundred ninety-seven thousand, three hundred nine".