249399841 has 2 divisors, whose sum is σ = 249399842. Its totient is φ = 249399840.

The previous prime is 249399823. The next prime is 249399847. The reversal of 249399841 is 148993942.

249399841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 247149841 + 2250000 = 15721^2 + 1500^2 .

It is a cyclic number.

It is not a de Polignac number, because 249399841 - 2¹⁵ = 249367073 is a prime.

It is not a weakly prime, because it can be changed into another prime (249399847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124699920 + 124699921.

It is an arithmetic number, because the mean of its divisors is an integer number (124699921).

Almost surely, 2^249399841 is an apocalyptic number.

It is an amenable number.

249399841 is a deficient number, since it is larger than the sum of its proper divisors (1).

249399841 is an equidigital number, since it uses as much as digits as its factorization.

249399841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 49.

The square root of 249399841 is about 15792.3982029330. The cubic root of 249399841 is about 629.4560190485.

The spelling of 249399841 in words is "two hundred forty-nine million, three hundred ninety-nine thousand, eight hundred forty-one".