1372663381 has 2 divisors, whose sum is σ = 1372663382. Its totient is φ = 1372663380.

The previous prime is 1372663373. The next prime is 1372663399. The reversal of 1372663381 is 1833662731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 842973156 + 529690225 = 29034^2 + 23015^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372663381 - 2³ = 1372663373 is a prime.

It is a super-2 number, since 2×1372663381² = 3768409515076702322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1372663301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686331690 + 686331691.

It is an arithmetic number, because the mean of its divisors is an integer number (686331691).

Almost surely, 2^1372663381 is an apocalyptic number.

It is an amenable number.

1372663381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372663381 is an equidigital number, since it uses as much as digits as its factorization.

1372663381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

The square root of 1372663381 is about 37049.4720745114. The cubic root of 1372663381 is about 1111.3597979460.

The spelling of 1372663381 in words is "one billion, three hundred seventy-two million, six hundred sixty-three thousand, three hundred eighty-one".