194072761 has 3 divisors (see below), whose sum is σ = 194086693. Its totient is φ = 194058830.

The previous prime is 194072737. The next prime is 194072797. The reversal of 194072761 is 167270491.

The square root of 194072761 is 13931.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 194072761 - 2⁷ = 194072633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 194072761.

It is not an unprimeable number, because it can be changed into a prime (194072161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6966 + ... + 20896.

Almost surely, 2^194072761 is an apocalyptic number.

194072761 is the 13931-st square number.

194072761 is the 6966-th centered octagonal number.

It is an amenable number.

194072761 is a deficient number, since it is larger than the sum of its proper divisors (13932).

194072761 is an frugal number, since it uses more digits than its factorization.

194072761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27862 (or 13931 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The cubic root of 194072761 is about 578.9684011061.

The spelling of 194072761 in words is "one hundred ninety-four million, seventy-two thousand, seven hundred sixty-one".