249349487 has 4 divisors (see below), whose sum is σ = 249632760. Its totient is φ = 249066216.

The previous prime is 249349439. The next prime is 249349493. The reversal of 249349487 is 784943942.

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 249349487 - 2²⁶ = 182240623 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 (249349427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140312 + ... + 142077.

It is an arithmetic number, because the mean of its divisors is an integer number (62408190).

Almost surely, 2^249349487 is an apocalyptic number.

249349487 is a deficient number, since it is larger than the sum of its proper divisors (283273).

249349487 is an equidigital number, since it uses as much as digits as its factorization.

249349487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283272.

The product of its digits is 1741824, while the sum is 50.

The square root of 249349487 is about 15790.8038744074. The cubic root of 249349487 is about 629.4136536623.

The spelling of 249349487 in words is "two hundred forty-nine million, three hundred forty-nine thousand, four hundred eighty-seven".