1197498990 has 16 divisors (see below), whose sum is σ = 2873997648. Its totient is φ = 319333056.

The previous prime is 1197498983. The next prime is 1197499019. The reversal of 1197498990 is 998947911.

It is a self number, because there is not a number n which added to its sum of digits gives 1197498990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19958287 + ... + 19958346.

It is an arithmetic number, because the mean of its divisors is an integer number (179624853).

Almost surely, 2^1197498990 is an apocalyptic number.

1197498990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1197498990 is an abundant number, since it is smaller than the sum of its proper divisors (1676498658).

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

1197498990 is a wasteful number, since it uses less digits than its factorization.

1197498990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39916643.

The product of its (nonzero) digits is 1469664, while the sum is 57.

The square root of 1197498990 is about 34604.8983526899. The cubic root of 1197498990 is about 1061.9198002289.

The spelling of 1197498990 in words is "one billion, one hundred ninety-seven million, four hundred ninety-eight thousand, nine hundred ninety".