249008399 has 16 divisors (see below), whose sum is σ = 264253440. Its totient is φ = 234269280.

The previous prime is 249008387. The next prime is 249008411. The reversal of 249008399 is 993800942.

It is a Cunningham number, because it is equal to 15780²-1.

It is an interprime number because it is at equal distance from previous prime (249008387) and next prime (249008411).

It is a cyclic number.

It is not a de Polignac number, because 249008399 - 2¹² = 249004303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249008339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488957 + ... + 489465.

It is an arithmetic number, because the mean of its divisors is an integer number (16515840).

Almost surely, 2^249008399 is an apocalyptic number.

249008399 is a deficient number, since it is larger than the sum of its proper divisors (15245041).

249008399 is a wasteful number, since it uses less digits than its factorization.

249008399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 249008399 is about 15779.9999683143. Note that the first 4 decimals coincide. The cubic root of 249008399 is about 629.1265286695.

The spelling of 249008399 in words is "two hundred forty-nine million, eight thousand, three hundred ninety-nine".