1373841257 has 2 divisors, whose sum is σ = 1373841258. Its totient is φ = 1373841256.

The previous prime is 1373841251. The next prime is 1373841263. The reversal of 1373841257 is 7521483731.

It is a balanced prime because it is at equal distance from previous prime (1373841251) and next prime (1373841263).

It can be written as a sum of positive squares in only one way, i.e., 696748816 + 677092441 = 26396^2 + 26021^2 .

It is an emirp because it is prime and its reverse (7521483731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1373841257 - 2¹⁰ = 1373840233 is a prime.

It is not a weakly prime, because it can be changed into another prime (1373841251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686920628 + 686920629.

It is an arithmetic number, because the mean of its divisors is an integer number (686920629).

Almost surely, 2^1373841257 is an apocalyptic number.

It is an amenable number.

1373841257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373841257 is an equidigital number, since it uses as much as digits as its factorization.

1373841257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 41.

The square root of 1373841257 is about 37065.3646548904. The cubic root of 1373841257 is about 1111.6775912719.

The spelling of 1373841257 in words is "one billion, three hundred seventy-three million, eight hundred forty-one thousand, two hundred fifty-seven".