1197789102 has 24 divisors (see below), whose sum is σ = 2626480584. Its totient is φ = 394452144.

The previous prime is 1197789091. The next prime is 1197789139. The reversal of 1197789102 is 2019877911.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 399373 + ... + 402360.

It is an arithmetic number, because the mean of its divisors is an integer number (109436691).

Almost surely, 2^1197789102 is an apocalyptic number.

1197789102 is an abundant number, since it is smaller than the sum of its proper divisors (1428691482).

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

1197789102 is a wasteful number, since it uses less digits than its factorization.

1197789102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801824 (or 801821 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 45.

The square root of 1197789102 is about 34609.0898753492. The cubic root of 1197789102 is about 1062.0055486107.

The spelling of 1197789102 in words is "one billion, one hundred ninety-seven million, seven hundred eighty-nine thousand, one hundred two".