249399769 has 2 divisors, whose sum is σ = 249399770. Its totient is φ = 249399768.

The previous prime is 249399751. The next prime is 249399779. The reversal of 249399769 is 967993942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168039369 + 81360400 = 12963^2 + 9020^2 .

It is a cyclic number.

It is not a de Polignac number, because 249399769 - 2¹⁷ = 249268697 is a prime.

It is a super-2 number, since 2×249399769² = 124400489554506722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (249399779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124699884 + 124699885.

It is an arithmetic number, because the mean of its divisors is an integer number (124699885).

Almost surely, 2^249399769 is an apocalyptic number.

It is an amenable number.

249399769 is a deficient number, since it is larger than the sum of its proper divisors (1).

249399769 is an equidigital number, since it uses as much as digits as its factorization.

249399769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6613488, while the sum is 58.

The square root of 249399769 is about 15792.3959233550. The cubic root of 249399769 is about 629.4559584753.

The spelling of 249399769 in words is "two hundred forty-nine million, three hundred ninety-nine thousand, seven hundred sixty-nine".