1376263961 has 2 divisors, whose sum is σ = 1376263962. Its totient is φ = 1376263960.

The previous prime is 1376263957. The next prime is 1376263997. The reversal of 1376263961 is 1693626731.

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., 1125199936 + 251064025 = 33544^2 + 15845^2 .

It is a cyclic number.

It is not a de Polignac number, because 1376263961 - 2² = 1376263957 is a prime.

It is not a weakly prime, because it can be changed into another prime (1376263921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688131980 + 688131981.

It is an arithmetic number, because the mean of its divisors is an integer number (688131981).

Almost surely, 2^1376263961 is an apocalyptic number.

It is an amenable number.

1376263961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376263961 is an equidigital number, since it uses as much as digits as its factorization.

1376263961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 44.

The square root of 1376263961 is about 37098.0317671976. The cubic root of 1376263961 is about 1112.3306711270.

The spelling of 1376263961 in words is "one billion, three hundred seventy-six million, two hundred sixty-three thousand, nine hundred sixty-one".