1357908749 has 2 divisors, whose sum is σ = 1357908750. Its totient is φ = 1357908748.

The previous prime is 1357908743. The next prime is 1357908757. The reversal of 1357908749 is 9478097531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 961620100 + 396288649 = 31010^2 + 19907^2 .

It is a cyclic number.

It is not a de Polignac number, because 1357908749 - 2⁴ = 1357908733 is a prime.

It is a super-2 number, since 2×1357908749² = 3687832341221490002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1357908749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1357908743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678954374 + 678954375.

It is an arithmetic number, because the mean of its divisors is an integer number (678954375).

Almost surely, 2^1357908749 is an apocalyptic number.

It is an amenable number.

1357908749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1357908749 is an equidigital number, since it uses as much as digits as its factorization.

1357908749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The square root of 1357908749 is about 36849.8134187949. The cubic root of 1357908749 is about 1107.3634768961.

The spelling of 1357908749 in words is "one billion, three hundred fifty-seven million, nine hundred eight thousand, seven hundred forty-nine".