1197653971 has 4 divisors (see below), whose sum is σ = 1201555432. Its totient is φ = 1193752512.

The previous prime is 1197653929. The next prime is 1197653981. The reversal of 1197653971 is 1793567911.

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

It is a cyclic number.

It is not a de Polignac number, because 1197653971 - 2⁷ = 1197653843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1197653981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1950270 + ... + 1950883.

It is an arithmetic number, because the mean of its divisors is an integer number (300388858).

Almost surely, 2^1197653971 is an apocalyptic number.

1197653971 is a deficient number, since it is larger than the sum of its proper divisors (3901461).

1197653971 is an equidigital number, since it uses as much as digits as its factorization.

1197653971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901460.

The product of its digits is 357210, while the sum is 49.

The square root of 1197653971 is about 34607.1375730499. The cubic root of 1197653971 is about 1061.9656096741.

The spelling of 1197653971 in words is "one billion, one hundred ninety-seven million, six hundred fifty-three thousand, nine hundred seventy-one".