1376744401 has 2 divisors, whose sum is σ = 1376744402. Its totient is φ = 1376744400.

The previous prime is 1376744399. The next prime is 1376744417. The reversal of 1376744401 is 1044476731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1107292176 + 269452225 = 33276^2 + 16415^2 .

It is a cyclic number.

It is not a de Polignac number, because 1376744401 - 2¹ = 1376744399 is a prime.

Together with 1376744399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1376744431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688372200 + 688372201.

It is an arithmetic number, because the mean of its divisors is an integer number (688372201).

Almost surely, 2^1376744401 is an apocalyptic number.

It is an amenable number.

1376744401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376744401 is an equidigital number, since it uses as much as digits as its factorization.

1376744401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 1376744401 is about 37104.5064783242. The cubic root of 1376744401 is about 1112.4600905769.

The spelling of 1376744401 in words is "one billion, three hundred seventy-six million, seven hundred forty-four thousand, four hundred one".