190720761 has 32 divisors (see below), whose sum is σ = 330835968. Its totient is φ = 94765440.

The previous prime is 190720757. The next prime is 190720799. The reversal of 190720761 is 167027091.

It is not a de Polignac number, because 190720761 - 2² = 190720757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (190720261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12636 + ... + 23261.

It is an arithmetic number, because the mean of its divisors is an integer number (10338624).

Almost surely, 2^190720761 is an apocalyptic number.

190720761 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

190720761 is a deficient number, since it is larger than the sum of its proper divisors (140115207).

190720761 is a wasteful number, since it uses less digits than its factorization.

190720761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35941.

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 190720761 is about 13810.1687534947. The cubic root of 190720761 is about 575.6157346126.

The spelling of 190720761 in words is "one hundred ninety million, seven hundred twenty thousand, seven hundred sixty-one".