249161949 has 12 divisors (see below), whose sum is σ = 363087036. Its totient is φ = 164637312.

The previous prime is 249161923. The next prime is 249161977. The reversal of 249161949 is 949161942.

249161949 is a `hidden beast` number, since 24 + 9 + 1 + 619 + 4 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 125552025 + 123609924 = 11205^2 + 11118^2 .

It is not a de Polignac number, because 249161949 - 2⁷ = 249161821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249161989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121482 + ... + 123515.

It is an arithmetic number, because the mean of its divisors is an integer number (30257253).

Almost surely, 2^249161949 is an apocalyptic number.

It is an amenable number.

249161949 is a deficient number, since it is larger than the sum of its proper divisors (113925087).

249161949 is a wasteful number, since it uses less digits than its factorization.

249161949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245116 (or 245113 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 249161949 is about 15784.8645543761. The cubic root of 249161949 is about 629.2558181891.

The spelling of 249161949 in words is "two hundred forty-nine million, one hundred sixty-one thousand, nine hundred forty-nine".