1357138949 has 2 divisors, whose sum is σ = 1357138950. Its totient is φ = 1357138948.

The previous prime is 1357138933. The next prime is 1357138957. The reversal of 1357138949 is 9498317531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 946792900 + 410346049 = 30770^2 + 20257^2 .

It is a cyclic number.

It is not a de Polignac number, because 1357138949 - 2⁴ = 1357138933 is a prime.

It is a super-2 number, since 2×1357138949² = 3683652253785649202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1357138897 and 1357138906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1357138969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678569474 + 678569475.

It is an arithmetic number, because the mean of its divisors is an integer number (678569475).

Almost surely, 2^1357138949 is an apocalyptic number.

It is an amenable number.

1357138949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1357138949 is an equidigital number, since it uses as much as digits as its factorization.

1357138949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 50.

The square root of 1357138949 is about 36839.3668376643. The cubic root of 1357138949 is about 1107.1541821403.

The spelling of 1357138949 in words is "one billion, three hundred fifty-seven million, one hundred thirty-eight thousand, nine hundred forty-nine".