997850519 has 2 divisors, whose sum is σ = 997850520. Its totient is φ = 997850518.

The previous prime is 997850509. The next prime is 997850549. The reversal of 997850519 is 915058799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 997850519 - 2⁸ = 997850263 is a prime.

It is a super-2 number, since 2×997850519² = 1991411316537138722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997850509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498925259 + 498925260.

It is an arithmetic number, because the mean of its divisors is an integer number (498925260).

Almost surely, 2^997850519 is an apocalyptic number.

997850519 is a deficient number, since it is larger than the sum of its proper divisors (1).

997850519 is an equidigital number, since it uses as much as digits as its factorization.

997850519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1020600, while the sum is 53.

The square root of 997850519 is about 31588.7720400778. The cubic root of 997850519 is about 999.2829923562.

The spelling of 997850519 in words is "nine hundred ninety-seven million, eight hundred fifty thousand, five hundred nineteen".