1192140661 has 4 divisors (see below), whose sum is σ = 1193265324. Its totient is φ = 1191016000.

The previous prime is 1192140637. The next prime is 1192140707. The reversal of 1192140661 is 1660412911.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1079122500 + 113018161 = 32850^2 + 10631^2 .

It is a 3-Lehmer number, since φ(1192140661) divides (1192140661-1)³.

It is a cyclic number.

It is not a de Polignac number, because 1192140661 - 2¹¹ = 1192138613 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 (1192140461) by changing a digit.

It is a nontrivial repunit in base 1060.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560740 + ... + 562861.

It is an arithmetic number, because the mean of its divisors is an integer number (298316331).

Almost surely, 2^1192140661 is an apocalyptic number.

It is an amenable number.

1192140661 is a deficient number, since it is larger than the sum of its proper divisors (1124663).

1192140661 is a wasteful number, since it uses less digits than its factorization.

1192140661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124662.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1192140661 is about 34527.3900114098. The cubic root of 1192140661 is about 1060.3335431306. Note that the first 3 decimals are identical.

The spelling of 1192140661 in words is "one billion, one hundred ninety-two million, one hundred forty thousand, six hundred sixty-one".