997753819 has 8 divisors (see below), whose sum is σ = 1022801472. Its totient is φ = 972740160.

The previous prime is 997753789. The next prime is 997753829. The reversal of 997753819 is 918357799.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 997753819 - 2¹⁹ = 997229531 is a prime.

It is a super-2 number, since 2×997753819² = 1991025366658169522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997753829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57217 + ... + 72589.

It is an arithmetic number, because the mean of its divisors is an integer number (127850184).

Almost surely, 2^997753819 is an apocalyptic number.

997753819 is a deficient number, since it is larger than the sum of its proper divisors (25047653).

997753819 is a wasteful number, since it uses less digits than its factorization.

997753819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16997.

The product of its digits is 4286520, while the sum is 58.

The square root of 997753819 is about 31587.2413958548. The cubic root of 997753819 is about 999.2507117073.

The spelling of 997753819 in words is "nine hundred ninety-seven million, seven hundred fifty-three thousand, eight hundred nineteen".