997063253 has 2 divisors, whose sum is σ = 997063254. Its totient is φ = 997063252.

The previous prime is 997063211. The next prime is 997063279. The reversal of 997063253 is 352360799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 607474609 + 389588644 = 24647^2 + 19738^2 .

It is a cyclic number.

It is not a de Polignac number, because 997063253 - 2²² = 992868949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990063253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498531626 + 498531627.

It is an arithmetic number, because the mean of its divisors is an integer number (498531627).

Almost surely, 2^997063253 is an apocalyptic number.

It is an amenable number.

997063253 is a deficient number, since it is larger than the sum of its proper divisors (1).

997063253 is an equidigital number, since it uses as much as digits as its factorization.

997063253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 306180, while the sum is 44.

The square root of 997063253 is about 31576.3084131125. The cubic root of 997063253 is about 999.0201244909.

The spelling of 997063253 in words is "nine hundred ninety-seven million, sixty-three thousand, two hundred fifty-three".