190467661 has 4 divisors (see below), whose sum is σ = 191043424. Its totient is φ = 189891900.

The previous prime is 190467659. The next prime is 190467671. The reversal of 190467661 is 166764091.

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, and also an emirpimes, since its reverse is a distinct semiprime: 166764091 = 13 ⋅12828007.

It is a cyclic number.

It is not a de Polignac number, because 190467661 - 2¹ = 190467659 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 (190467611) 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, 287385 + ... + 288046.

It is an arithmetic number, because the mean of its divisors is an integer number (47760856).

Almost surely, 2^190467661 is an apocalyptic number.

It is an amenable number.

190467661 is a deficient number, since it is larger than the sum of its proper divisors (575763).

190467661 is an equidigital number, since it uses as much as digits as its factorization.

190467661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575762.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 190467661 is about 13801.0021737554. The cubic root of 190467661 is about 575.3609942346.

The spelling of 190467661 in words is "one hundred ninety million, four hundred sixty-seven thousand, six hundred sixty-one".