253990973 has 2 divisors, whose sum is σ = 253990974. Its totient is φ = 253990972.

The previous prime is 253990969. The next prime is 253990991. The reversal of 253990973 is 379099352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150724729 + 103266244 = 12277^2 + 10162^2 .

It is a cyclic number.

It is not a de Polignac number, because 253990973 - 2² = 253990969 is a prime.

It is a super-2 number, since 2×253990973² = 129022828730973458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253990963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126995486 + 126995487.

It is an arithmetic number, because the mean of its divisors is an integer number (126995487).

Almost surely, 2^253990973 is an apocalyptic number.

It is an amenable number.

253990973 is a deficient number, since it is larger than the sum of its proper divisors (1).

253990973 is an equidigital number, since it uses as much as digits as its factorization.

253990973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 459270, while the sum is 47.

The square root of 253990973 is about 15937.0942458153. The cubic root of 253990973 is about 633.2950506561.

The spelling of 253990973 in words is "two hundred fifty-three million, nine hundred ninety thousand, nine hundred seventy-three".