997790619 has 64 divisors (see below), whose sum is σ = 1605795840. Its totient is φ = 539360640.

The previous prime is 997790609. The next prime is 997790641. The reversal of 997790619 is 916097799.

It is not a de Polignac number, because 997790619 - 2⁵ = 997790587 is a prime.

It is a super-2 number, since 2×997790619² = 1991172238728806322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (997790609) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5064829 + ... + 5065025.

It is an arithmetic number, because the mean of its divisors is an integer number (25090560).

Almost surely, 2^997790619 is an apocalyptic number.

997790619 is a deficient number, since it is larger than the sum of its proper divisors (608005221).

997790619 is a wasteful number, since it uses less digits than its factorization.

997790619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400.

The product of its (nonzero) digits is 1928934, while the sum is 57.

The square root of 997790619 is about 31587.8239041565. The cubic root of 997790619 is about 999.2629966261.

The spelling of 997790619 in words is "nine hundred ninety-seven million, seven hundred ninety thousand, six hundred nineteen".