1376275991 has 2 divisors, whose sum is σ = 1376275992. Its totient is φ = 1376275990.

The previous prime is 1376275951. The next prime is 1376276053. The reversal of 1376275991 is 1995726731.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1376275991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1376275951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688137995 + 688137996.

It is an arithmetic number, because the mean of its divisors is an integer number (688137996).

Almost surely, 2^1376275991 is an apocalyptic number.

1376275991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376275991 is an equidigital number, since it uses as much as digits as its factorization.

1376275991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 714420, while the sum is 50.

The square root of 1376275991 is about 37098.1939048251. The cubic root of 1376275991 is about 1112.3339120990. Note that the first 3 decimals are identical.

The spelling of 1376275991 in words is "one billion, three hundred seventy-six million, two hundred seventy-five thousand, nine hundred ninety-one".