1249938133 has 2 divisors, whose sum is σ = 1249938134. Its totient is φ = 1249938132.

The previous prime is 1249938113. The next prime is 1249938139. The reversal of 1249938133 is 3318399421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1043096209 + 206841924 = 32297^2 + 14382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1249938133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1249938133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249938139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624969066 + 624969067.

It is an arithmetic number, because the mean of its divisors is an integer number (624969067).

Almost surely, 2^1249938133 is an apocalyptic number.

It is an amenable number.

1249938133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249938133 is an equidigital number, since it uses as much as digits as its factorization.

1249938133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 1249938133 is about 35354.4641169966. The cubic root of 1249938133 is about 1077.1995729346.

The spelling of 1249938133 in words is "one billion, two hundred forty-nine million, nine hundred thirty-eight thousand, one hundred thirty-three".