1191710461 has 4 divisors (see below), whose sum is σ = 1191791232. Its totient is φ = 1191629692.

The previous prime is 1191710449. The next prime is 1191710479. The reversal of 1191710461 is 1640171911.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1640171911 = 7 ⋅234310273.

It is a cyclic number.

It is not a de Polignac number, because 1191710461 - 2²¹ = 1189613309 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 (1191710411) 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, 11245 + ... + 50098.

It is an arithmetic number, because the mean of its divisors is an integer number (297947808).

Almost surely, 2^1191710461 is an apocalyptic number.

It is an amenable number.

1191710461 is a deficient number, since it is larger than the sum of its proper divisors (80771).

1191710461 is an equidigital number, since it uses as much as digits as its factorization.

1191710461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80770.

The product of its (nonzero) digits is 1512, while the sum is 31.

The square root of 1191710461 is about 34521.1596126202. The cubic root of 1191710461 is about 1060.2059825761.

The spelling of 1191710461 in words is "one billion, one hundred ninety-one million, seven hundred ten thousand, four hundred sixty-one".