1195491961 has 2 divisors, whose sum is σ = 1195491962. Its totient is φ = 1195491960.

The previous prime is 1195491949. The next prime is 1195491971. The reversal of 1195491961 is 1691945911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 792084736 + 403407225 = 28144^2 + 20085^2 .

It is a cyclic number.

It is not a de Polignac number, because 1195491961 - 2⁵ = 1195491929 is a prime.

It is not a weakly prime, because it can be changed into another prime (1195491931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597745980 + 597745981.

It is an arithmetic number, because the mean of its divisors is an integer number (597745981).

Almost surely, 2^1195491961 is an apocalyptic number.

It is an amenable number.

1195491961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1195491961 is an equidigital number, since it uses as much as digits as its factorization.

1195491961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 46.

The square root of 1195491961 is about 34575.8869878995. The cubic root of 1195491961 is about 1061.3262031673.

The spelling of 1195491961 in words is "one billion, one hundred ninety-five million, four hundred ninety-one thousand, nine hundred sixty-one".