249753961 has 2 divisors, whose sum is σ = 249753962. Its totient is φ = 249753960.

The previous prime is 249753937. The next prime is 249754007. The reversal of 249753961 is 169357942.

It is a happy number.

It is an a-pointer prime, because the next prime (249754007) can be obtained adding 249753961 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215179561 + 34574400 = 14669^2 + 5880^2 .

It is a cyclic number.

It is not a de Polignac number, because 249753961 - 2⁵ = 249753929 is a prime.

It is not a weakly prime, because it can be changed into another prime (249753661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124876980 + 124876981.

It is an arithmetic number, because the mean of its divisors is an integer number (124876981).

Almost surely, 2^249753961 is an apocalyptic number.

It is an amenable number.

249753961 is a deficient number, since it is larger than the sum of its proper divisors (1).

249753961 is an equidigital number, since it uses as much as digits as its factorization.

249753961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 46.

The square root of 249753961 is about 15803.6059492763. The cubic root of 249753961 is about 629.7537973051.

The spelling of 249753961 in words is "two hundred forty-nine million, seven hundred fifty-three thousand, nine hundred sixty-one".