249197513 has 4 divisors (see below), whose sum is σ = 254992848. Its totient is φ = 243402180.

The previous prime is 249197489. The next prime is 249197527. The reversal of 249197513 is 315791942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 315791942 = 2 ⋅157895971.

It is a cyclic number.

It is not a de Polignac number, because 249197513 - 2⁶ = 249197449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249197563) 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 in 3 ways as a sum of consecutive naturals, for example, 2897603 + ... + 2897688.

It is an arithmetic number, because the mean of its divisors is an integer number (63748212).

Almost surely, 2^249197513 is an apocalyptic number.

It is an amenable number.

249197513 is a deficient number, since it is larger than the sum of its proper divisors (5795335).

249197513 is an equidigital number, since it uses as much as digits as its factorization.

249197513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5795334.

The product of its digits is 68040, while the sum is 41.

The square root of 249197513 is about 15785.9910363588. The cubic root of 249197513 is about 629.2857555977.

The spelling of 249197513 in words is "two hundred forty-nine million, one hundred ninety-seven thousand, five hundred thirteen".