249149651 has 4 divisors (see below), whose sum is σ = 249705000. Its totient is φ = 248594304.

The previous prime is 249149633. The next prime is 249149653. The reversal of 249149651 is 156941942.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 249149651 - 2⁶ = 249149587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 249149599 and 249149608.

It is not an unprimeable number, because it can be changed into a prime (249149653) 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, 277001 + ... + 277898.

It is an arithmetic number, because the mean of its divisors is an integer number (62426250).

Almost surely, 2^249149651 is an apocalyptic number.

249149651 is a deficient number, since it is larger than the sum of its proper divisors (555349).

249149651 is an equidigital number, since it uses as much as digits as its factorization.

249149651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555348.

The product of its digits is 77760, while the sum is 41.

The square root of 249149651 is about 15784.4749991883. The cubic root of 249149651 is about 629.2454651966.

The spelling of 249149651 in words is "two hundred forty-nine million, one hundred forty-nine thousand, six hundred fifty-one".