1372967021 has 2 divisors, whose sum is σ = 1372967022. Its totient is φ = 1372967020.

The previous prime is 1372966979. The next prime is 1372967027. The reversal of 1372967021 is 1207692731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1253938921 + 119028100 = 35411^2 + 10910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1372967021 is a prime.

It is a super-2 number, since 2×1372967021² = 3770076881507228882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1372967027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686483510 + 686483511.

It is an arithmetic number, because the mean of its divisors is an integer number (686483511).

Almost surely, 2^1372967021 is an apocalyptic number.

It is an amenable number.

1372967021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372967021 is an equidigital number, since it uses as much as digits as its factorization.

1372967021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 1372967021 is about 37053.5696121170. The cubic root of 1372967021 is about 1111.4417380182.

The spelling of 1372967021 in words is "one billion, three hundred seventy-two million, nine hundred sixty-seven thousand, twenty-one".