1249159939 has 2 divisors, whose sum is σ = 1249159940. Its totient is φ = 1249159938.

The previous prime is 1249159909. The next prime is 1249159943. The reversal of 1249159939 is 9399519421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1249159939 - 2¹³ = 1249151747 is a prime.

It is not a weakly prime, because it can be changed into another prime (1249159909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624579969 + 624579970.

It is an arithmetic number, because the mean of its divisors is an integer number (624579970).

Almost surely, 2^1249159939 is an apocalyptic number.

1249159939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249159939 is an equidigital number, since it uses as much as digits as its factorization.

1249159939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 52.

The square root of 1249159939 is about 35343.4568060341. The cubic root of 1249159939 is about 1076.9759767294.

The spelling of 1249159939 in words is "one billion, two hundred forty-nine million, one hundred fifty-nine thousand, nine hundred thirty-nine".