1197885531 has 4 divisors (see below), whose sum is σ = 1597180712. Its totient is φ = 798590352.

The previous prime is 1197885527. The next prime is 1197885551. The reversal of 1197885531 is 1355887911.

It is a happy number.

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

It is not a de Polignac number, because 1197885531 - 2² = 1197885527 is a prime.

It is a super-2 number, since 2×1197885531² = 2869859490758303922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1197885551) 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, 199647586 + ... + 199647591.

It is an arithmetic number, because the mean of its divisors is an integer number (399295178).

Almost surely, 2^1197885531 is an apocalyptic number.

1197885531 is a deficient number, since it is larger than the sum of its proper divisors (399295181).

1197885531 is an equidigital number, since it uses as much as digits as its factorization.

1197885531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399295180.

The product of its digits is 302400, while the sum is 48.

The square root of 1197885531 is about 34610.4829639807. The cubic root of 1197885531 is about 1062.0340470570.

The spelling of 1197885531 in words is "one billion, one hundred ninety-seven million, eight hundred eighty-five thousand, five hundred thirty-one".