1377623749 has 2 divisors, whose sum is σ = 1377623750. Its totient is φ = 1377623748.

The previous prime is 1377623683. The next prime is 1377623759. The reversal of 1377623749 is 9473267731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1376781025 + 842724 = 37105^2 + 918^2 .

It is a cyclic number.

It is not a de Polignac number, because 1377623749 - 2¹¹ = 1377621701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1377623759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688811874 + 688811875.

It is an arithmetic number, because the mean of its divisors is an integer number (688811875).

Almost surely, 2^1377623749 is an apocalyptic number.

It is an amenable number.

1377623749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377623749 is an equidigital number, since it uses as much as digits as its factorization.

1377623749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 49.

The square root of 1377623749 is about 37116.3541986548. The cubic root of 1377623749 is about 1112.6968886726.

The spelling of 1377623749 in words is "one billion, three hundred seventy-seven million, six hundred twenty-three thousand, seven hundred forty-nine".