1376631629 has 2 divisors, whose sum is σ = 1376631630. Its totient is φ = 1376631628.

The previous prime is 1376631589. The next prime is 1376631631. The reversal of 1376631629 is 9261366731.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1149074404 + 227557225 = 33898^2 + 15085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1376631629 is a prime.

It is a super-2 number, since 2×1376631629² = 3790229283926387282, which contains 22 as substring.

Together with 1376631631, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1376631629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1376631679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688315814 + 688315815.

It is an arithmetic number, because the mean of its divisors is an integer number (688315815).

Almost surely, 2^1376631629 is an apocalyptic number.

It is an amenable number.

1376631629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376631629 is an equidigital number, since it uses as much as digits as its factorization.

1376631629 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 1376631629 is about 37102.9867935184. The cubic root of 1376631629 is about 1112.4297151069.

The spelling of 1376631629 in words is "one billion, three hundred seventy-six million, six hundred thirty-one thousand, six hundred twenty-nine".