1997070618 has 8 divisors (see below), whose sum is σ = 3994141248. Its totient is φ = 665690204.

The previous prime is 1997070617. The next prime is 1997070619. The reversal of 1997070618 is 8160707991.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1997070617) and next prime (1997070619).

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

1997070618 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1997070613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166422546 + ... + 166422557.

It is an arithmetic number, because the mean of its divisors is an integer number (499267656).

Almost surely, 2^1997070618 is an apocalyptic number.

1997070618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1997070618 is a wasteful number, since it uses less digits than its factorization.

1997070618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332845108.

The product of its (nonzero) digits is 190512, while the sum is 48.

The square root of 1997070618 is about 44688.5960620828. The cubic root of 1997070618 is about 1259.3056176501.

The spelling of 1997070618 in words is "one billion, nine hundred ninety-seven million, seventy thousand, six hundred eighteen".