1249982639 has 2 divisors, whose sum is σ = 1249982640. Its totient is φ = 1249982638.

The previous prime is 1249982627. The next prime is 1249982653. The reversal of 1249982639 is 9362899421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1249982639 - 2²⁴ = 1233205423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249982689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624991319 + 624991320.

It is an arithmetic number, because the mean of its divisors is an integer number (624991320).

Almost surely, 2^1249982639 is an apocalyptic number.

1249982639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249982639 is an equidigital number, since it uses as much as digits as its factorization.

1249982639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 53.

The square root of 1249982639 is about 35355.0935368583. The cubic root of 1249982639 is about 1077.2123579074.

The spelling of 1249982639 in words is "one billion, two hundred forty-nine million, nine hundred eighty-two thousand, six hundred thirty-nine".