190910749 has 4 divisors (see below), whose sum is σ = 190945980. Its totient is φ = 190875520.

The previous prime is 190910747. The next prime is 190910767. The reversal of 190910749 is 947019091.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 104755225 + 86155524 = 10235^2 + 9282^2 .

It is a cyclic number.

It is not a de Polignac number, because 190910749 - 2¹ = 190910747 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 (190910743) 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, 7582 + ... + 20959.

It is an arithmetic number, because the mean of its divisors is an integer number (47736495).

Almost surely, 2^190910749 is an apocalyptic number.

It is an amenable number.

190910749 is a deficient number, since it is larger than the sum of its proper divisors (35231).

190910749 is an equidigital number, since it uses as much as digits as its factorization.

190910749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35230.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 190910749 is about 13817.0455959297. The cubic root of 190910749 is about 575.8068059086.

The spelling of 190910749 in words is "one hundred ninety million, nine hundred ten thousand, seven hundred forty-nine".