997819075 has 48 divisors (see below), whose sum is σ = 1385911296. Its totient is φ = 706492800.

The previous prime is 997819073. The next prime is 997819093. The reversal of 997819075 is 570918799.

It is not a de Polignac number, because 997819075 - 2¹ = 997819073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is not an unprimeable number, because it can be changed into a prime (997819073) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3250072 + ... + 3250378.

It is an arithmetic number, because the mean of its divisors is an integer number (28873152).

Almost surely, 2^997819075 is an apocalyptic number.

997819075 is the 16885-th nonagonal number.

997819075 is a deficient number, since it is larger than the sum of its proper divisors (388092221).

997819075 is a wasteful number, since it uses less digits than its factorization.

997819075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 55.

The square root of 997819075 is about 31588.2743276679. The cubic root of 997819075 is about 999.2724958661.

The spelling of 997819075 in words is "nine hundred ninety-seven million, eight hundred nineteen thousand, seventy-five".