1021997368 has 32 divisors (see below), whose sum is σ = 2198108160. Its totient is φ = 436376160.

The previous prime is 1021997329. The next prime is 1021997369. The reversal of 1021997368 is 8637991201.

It is a happy number.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021997369) 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, 18496 + ... + 48847.

It is an arithmetic number, because the mean of its divisors is an integer number (68690880).

Almost surely, 2^1021997368 is an apocalyptic number.

It is an amenable number.

1021997368 is an abundant number, since it is smaller than the sum of its proper divisors (1176110792).

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

1021997368 is a wasteful number, since it uses less digits than its factorization.

1021997368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67627 (or 67623 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 1021997368 is about 31968.6935610450. The cubic root of 1021997368 is about 1007.2793386544.

The spelling of 1021997368 in words is "one billion, twenty-one million, nine hundred ninety-seven thousand, three hundred sixty-eight".