1367637421 has 2 divisors, whose sum is σ = 1367637422. Its totient is φ = 1367637420.

The previous prime is 1367637391. The next prime is 1367637463. The reversal of 1367637421 is 1247367631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1156952196 + 210685225 = 34014^2 + 14515^2 .

It is a cyclic number.

It is not a de Polignac number, because 1367637421 - 2⁵ = 1367637389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1367637121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683818710 + 683818711.

It is an arithmetic number, because the mean of its divisors is an integer number (683818711).

Almost surely, 2^1367637421 is an apocalyptic number.

It is an amenable number.

1367637421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1367637421 is an equidigital number, since it uses as much as digits as its factorization.

1367637421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 40.

The square root of 1367637421 is about 36981.5821862721. The cubic root of 1367637421 is about 1110.0017371398.

The spelling of 1367637421 in words is "one billion, three hundred sixty-seven million, six hundred thirty-seven thousand, four hundred twenty-one".