1197443643 has 8 divisors (see below), whose sum is σ = 1741736256. Its totient is φ = 725723400.

The previous prime is 1197443633. The next prime is 1197443657. The reversal of 1197443643 is 3463447911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1197443643 - 2⁴ = 1197443627 is a prime.

It is a super-2 number, since 2×1197443643² = 2867742556322222898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1197443595 and 1197443604.

It is not an unprimeable number, because it can be changed into a prime (1197443623) 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, 18143053 + ... + 18143118.

It is an arithmetic number, because the mean of its divisors is an integer number (217717032).

Almost surely, 2^1197443643 is an apocalyptic number.

1197443643 is a deficient number, since it is larger than the sum of its proper divisors (544292613).

1197443643 is a wasteful number, since it uses less digits than its factorization.

1197443643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36286185.

The product of its digits is 217728, while the sum is 42.

The square root of 1197443643 is about 34604.0986445248. The cubic root of 1197443643 is about 1061.9034397473.

The spelling of 1197443643 in words is "one billion, one hundred ninety-seven million, four hundred forty-three thousand, six hundred forty-three".