190394247 has 4 divisors (see below), whose sum is σ = 253859000. Its totient is φ = 126929496.

The previous prime is 190394233. The next prime is 190394249. The reversal of 190394247 is 742493091.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 190394247 - 2⁸ = 190393991 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 (190394249) 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, 31732372 + ... + 31732377.

It is an arithmetic number, because the mean of its divisors is an integer number (63464750).

Almost surely, 2^190394247 is an apocalyptic number.

190394247 is a deficient number, since it is larger than the sum of its proper divisors (63464753).

190394247 is an equidigital number, since it uses as much as digits as its factorization.

190394247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63464752.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 190394247 is about 13798.3421830305. The cubic root of 190394247 is about 575.2870622087.

The spelling of 190394247 in words is "one hundred ninety million, three hundred ninety-four thousand, two hundred forty-seven".