1373317381 has 2 divisors, whose sum is σ = 1373317382. Its totient is φ = 1373317380.

The previous prime is 1373317289. The next prime is 1373317457. The reversal of 1373317381 is 1837133731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1318053025 + 55264356 = 36305^2 + 7434^2 .

It is a cyclic number.

It is not a de Polignac number, because 1373317381 - 2⁹ = 1373316869 is a prime.

It is a super-2 number, since 2×1373317381² = 3772001257913398322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1373317381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1373317481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686658690 + 686658691.

It is an arithmetic number, because the mean of its divisors is an integer number (686658691).

Almost surely, 2^1373317381 is an apocalyptic number.

It is an amenable number.

1373317381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373317381 is an equidigital number, since it uses as much as digits as its factorization.

1373317381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 37.

The square root of 1373317381 is about 37058.2970601726. The cubic root of 1373317381 is about 1111.5362709052.

The spelling of 1373317381 in words is "one billion, three hundred seventy-three million, three hundred seventeen thousand, three hundred eighty-one".