1197498989 has 4 divisors (see below), whose sum is σ = 1267940124. Its totient is φ = 1127057856.

The previous prime is 1197498983. The next prime is 1197499019. The reversal of 1197498989 is 9898947911.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 538704100 + 658794889 = 23210^2 + 25667^2 .

It is a cyclic number.

It is not a de Polignac number, because 1197498989 - 2¹⁶ = 1197433453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1197498983) 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, 35220542 + ... + 35220575.

It is an arithmetic number, because the mean of its divisors is an integer number (316985031).

Almost surely, 2^1197498989 is an apocalyptic number.

It is an amenable number.

1197498989 is a deficient number, since it is larger than the sum of its proper divisors (70441135).

1197498989 is an equidigital number, since it uses as much as digits as its factorization.

1197498989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70441134.

The product of its digits is 11757312, while the sum is 65.

The square root of 1197498989 is about 34604.8983382411. The cubic root of 1197498989 is about 1061.9197999333.

The spelling of 1197498989 in words is "one billion, one hundred ninety-seven million, four hundred ninety-eight thousand, nine hundred eighty-nine".