1376157749 has 2 divisors, whose sum is σ = 1376157750. Its totient is φ = 1376157748.

The previous prime is 1376157703. The next prime is 1376157779. The reversal of 1376157749 is 9477516731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1018758724 + 357399025 = 31918^2 + 18905^2 .

It is a cyclic number.

It is not a de Polignac number, because 1376157749 - 2⁸ = 1376157493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1376157697 and 1376157706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1376157779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688078874 + 688078875.

It is an arithmetic number, because the mean of its divisors is an integer number (688078875).

Almost surely, 2^1376157749 is an apocalyptic number.

It is an amenable number.

1376157749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376157749 is an equidigital number, since it uses as much as digits as its factorization.

1376157749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1111320, while the sum is 50.

The square root of 1376157749 is about 37096.6002350620. The cubic root of 1376157749 is about 1112.3020559999.

The spelling of 1376157749 in words is "one billion, three hundred seventy-six million, one hundred fifty-seven thousand, seven hundred forty-nine".