190839561 has 8 divisors (see below), whose sum is σ = 277584864. Its totient is φ = 115660320.

The previous prime is 190839559. The next prime is 190839563. The reversal of 190839561 is 165938091.

It is an interprime number because it is at equal distance from previous prime (190839559) and next prime (190839563).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 190839561 - 2¹ = 190839559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (190839563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2891476 + ... + 2891541.

It is an arithmetic number, because the mean of its divisors is an integer number (34698108).

Almost surely, 2^190839561 is an apocalyptic number.

190839561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

190839561 is a deficient number, since it is larger than the sum of its proper divisors (86745303).

190839561 is a wasteful number, since it uses less digits than its factorization.

190839561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5783031.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 190839561 is about 13814.4692623351. The cubic root of 190839561 is about 575.7352268573.

The spelling of 190839561 in words is "one hundred ninety million, eight hundred thirty-nine thousand, five hundred sixty-one".