1197872061 has 4 divisors (see below), whose sum is σ = 1597162752. Its totient is φ = 798581372.

The previous prime is 1197872047. The next prime is 1197872083. The reversal of 1197872061 is 1602787911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1602787911 = 3 ⋅534262637.

It is a cyclic number.

It is not a de Polignac number, because 1197872061 - 2¹⁷ = 1197740989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1197872021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199645341 + ... + 199645346.

It is an arithmetic number, because the mean of its divisors is an integer number (399290688).

Almost surely, 2^1197872061 is an apocalyptic number.

It is an amenable number.

1197872061 is a deficient number, since it is larger than the sum of its proper divisors (399290691).

1197872061 is an equidigital number, since it uses as much as digits as its factorization.

1197872061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399290690.

The product of its (nonzero) digits is 42336, while the sum is 42.

The square root of 1197872061 is about 34610.2883692118. The cubic root of 1197872061 is about 1062.0300662503.

The spelling of 1197872061 in words is "one billion, one hundred ninety-seven million, eight hundred seventy-two thousand, sixty-one".