1249095389 has 2 divisors, whose sum is σ = 1249095390. Its totient is φ = 1249095388.

The previous prime is 1249095377. The next prime is 1249095391. The reversal of 1249095389 is 9835909421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1022080900 + 227014489 = 31970^2 + 15067^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1249095389 is a prime.

It is a super-2 number, since 2×1249095389² = 3120478581642122642, which contains 22 as substring.

Together with 1249095391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249095319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624547694 + 624547695.

It is an arithmetic number, because the mean of its divisors is an integer number (624547695).

Almost surely, 2^1249095389 is an apocalyptic number.

It is an amenable number.

1249095389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249095389 is an equidigital number, since it uses as much as digits as its factorization.

1249095389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 50.

The square root of 1249095389 is about 35342.5436124793. The cubic root of 1249095389 is about 1076.9574255963.

The spelling of 1249095389 in words is "one billion, two hundred forty-nine million, ninety-five thousand, three hundred eighty-nine".