249659401 has 2 divisors, whose sum is σ = 249659402. Its totient is φ = 249659400.

The previous prime is 249659393. The next prime is 249659447. The reversal of 249659401 is 104956942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210221001 + 39438400 = 14499^2 + 6280^2 .

It is a cyclic number.

It is not a de Polignac number, because 249659401 - 2³ = 249659393 is a prime.

It is not a weakly prime, because it can be changed into another prime (249659471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124829700 + 124829701.

It is an arithmetic number, because the mean of its divisors is an integer number (124829701).

Almost surely, 2^249659401 is an apocalyptic number.

It is an amenable number.

249659401 is a deficient number, since it is larger than the sum of its proper divisors (1).

249659401 is an equidigital number, since it uses as much as digits as its factorization.

249659401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 249659401 is about 15800.6139437681. The cubic root of 249659401 is about 629.6743096954.

The spelling of 249659401 in words is "two hundred forty-nine million, six hundred fifty-nine thousand, four hundred one".