997859542 has 16 divisors (see below), whose sum is σ = 1520391600. Its totient is φ = 491074848.

The previous prime is 997859477. The next prime is 997859543. The reversal of 997859542 is 245958799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997859543) 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, 217084 + ... + 221632.

It is an arithmetic number, because the mean of its divisors is an integer number (95024475).

Almost surely, 2^997859542 is an apocalyptic number.

997859542 is a deficient number, since it is larger than the sum of its proper divisors (522532058).

997859542 is a wasteful number, since it uses less digits than its factorization.

997859542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6255.

The product of its digits is 8164800, while the sum is 58.

The square root of 997859542 is about 31588.9148594883. The cubic root of 997859542 is about 999.2860043315.

The spelling of 997859542 in words is "nine hundred ninety-seven million, eight hundred fifty-nine thousand, five hundred forty-two".