191761013 has 4 divisors (see below), whose sum is σ = 193553280. Its totient is φ = 189968748.

The previous prime is 191760997. The next prime is 191761019. The reversal of 191761013 is 310167191.

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.

It is a cyclic number.

It is not a de Polignac number, because 191761013 - 2⁴ = 191760997 is a prime.

It is a super-2 number, since 2×191761013² = 73544572213572338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191761019) 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, 895973 + ... + 896186.

It is an arithmetic number, because the mean of its divisors is an integer number (48388320).

Almost surely, 2^191761013 is an apocalyptic number.

It is an amenable number.

191761013 is a deficient number, since it is larger than the sum of its proper divisors (1792267).

191761013 is a wasteful number, since it uses less digits than its factorization.

191761013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792266.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 191761013 is about 13847.7800747990. The cubic root of 191761013 is about 576.6603683958.

The spelling of 191761013 in words is "one hundred ninety-one million, seven hundred sixty-one thousand, thirteen".