1197239690 has 16 divisors (see below), whose sum is σ = 2155743720. Its totient is φ = 478737600.

The previous prime is 1197239689. The next prime is 1197239699. The reversal of 1197239690 is 969327911.

It can be written as a sum of positive squares in 4 ways, for example, as 1095411409 + 101828281 = 33097^2 + 10091^2 .

It is a super-2 number, since 2×1197239690² = 2866765750622592200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1197239699) 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, 14876 + ... + 51144.

Almost surely, 2^1197239690 is an apocalyptic number.

1197239690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1197239690 is a deficient number, since it is larger than the sum of its proper divisors (958504030).

1197239690 is a wasteful number, since it uses less digits than its factorization.

1197239690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39577.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 1197239690 is about 34601.1515704319. The cubic root of 1197239690 is about 1061.8431472258.

The spelling of 1197239690 in words is "one billion, one hundred ninety-seven million, two hundred thirty-nine thousand, six hundred ninety".