249470321 has 2 divisors, whose sum is σ = 249470322. Its totient is φ = 249470320.

The previous prime is 249470269. The next prime is 249470329. The reversal of 249470321 is 123074942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167314225 + 82156096 = 12935^2 + 9064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249470321 is a prime.

It is not a weakly prime, because it can be changed into another prime (249470329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124735160 + 124735161.

It is an arithmetic number, because the mean of its divisors is an integer number (124735161).

Almost surely, 2^249470321 is an apocalyptic number.

It is an amenable number.

249470321 is a deficient number, since it is larger than the sum of its proper divisors (1).

249470321 is an equidigital number, since it uses as much as digits as its factorization.

249470321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 249470321 is about 15794.6294986619. The cubic root of 249470321 is about 629.5153078885.

The spelling of 249470321 in words is "two hundred forty-nine million, four hundred seventy thousand, three hundred twenty-one".