249046147 has 4 divisors (see below), whose sum is σ = 284624176. Its totient is φ = 213468120.

The previous prime is 249046121. The next prime is 249046151. The reversal of 249046147 is 741640942.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249046147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249046247) 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, 17789004 + ... + 17789017.

It is an arithmetic number, because the mean of its divisors is an integer number (71156044).

Almost surely, 2^249046147 is an apocalyptic number.

249046147 is a deficient number, since it is larger than the sum of its proper divisors (35578029).

249046147 is an equidigital number, since it uses as much as digits as its factorization.

249046147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35578028.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 249046147 is about 15781.1959939670. The cubic root of 249046147 is about 629.1583175147.

The spelling of 249046147 in words is "two hundred forty-nine million, forty-six thousand, one hundred forty-seven".