1197679647 has 4 divisors (see below), whose sum is σ = 1596906200. Its totient is φ = 798453096.

The previous prime is 1197679643. The next prime is 1197679657. The reversal of 1197679647 is 7469767911.

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

It is not a de Polignac number, because 1197679647 - 2² = 1197679643 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 (1197679643) 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, 199613272 + ... + 199613277.

It is an arithmetic number, because the mean of its divisors is an integer number (399226550).

Almost surely, 2^1197679647 is an apocalyptic number.

1197679647 is a deficient number, since it is larger than the sum of its proper divisors (399226553).

1197679647 is an equidigital number, since it uses as much as digits as its factorization.

1197679647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399226552.

The product of its digits is 4000752, while the sum is 57.

The square root of 1197679647 is about 34607.5085349986. The cubic root of 1197679647 is about 1061.9731986313.

The spelling of 1197679647 in words is "one billion, one hundred ninety-seven million, six hundred seventy-nine thousand, six hundred forty-seven".