249147901 has 2 divisors, whose sum is σ = 249147902. Its totient is φ = 249147900.

The previous prime is 249147889. The next prime is 249147907. The reversal of 249147901 is 109741942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239444676 + 9703225 = 15474^2 + 3115^2 .

It is a cyclic number.

It is not a de Polignac number, because 249147901 - 2¹⁷ = 249016829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249147907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124573950 + 124573951.

It is an arithmetic number, because the mean of its divisors is an integer number (124573951).

Almost surely, 2^249147901 is an apocalyptic number.

It is an amenable number.

249147901 is a deficient number, since it is larger than the sum of its proper divisors (1).

249147901 is an equidigital number, since it uses as much as digits as its factorization.

249147901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 249147901 is about 15784.4195648747. The cubic root of 249147901 is about 629.2439919426.

The spelling of 249147901 in words is "two hundred forty-nine million, one hundred forty-seven thousand, nine hundred one".