190387249 has 4 divisors (see below), whose sum is σ = 205032436. Its totient is φ = 175742064.

The previous prime is 190387247. The next prime is 190387331. The reversal of 190387249 is 942783091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 942783091 = 18757 ⋅50263.

It can be written as a sum of positive squares in 2 ways, for example, as 103897249 + 86490000 = 10193^2 + 9300^2 .

It is a cyclic number.

It is not a de Polignac number, because 190387249 - 2¹ = 190387247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190387247) 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, 7322574 + ... + 7322599.

It is an arithmetic number, because the mean of its divisors is an integer number (51258109).

Almost surely, 2^190387249 is an apocalyptic number.

It is an amenable number.

190387249 is a deficient number, since it is larger than the sum of its proper divisors (14645187).

190387249 is a wasteful number, since it uses less digits than its factorization.

190387249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14645186.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 190387249 is about 13798.0885995126. The cubic root of 190387249 is about 575.2800138371.

The spelling of 190387249 in words is "one hundred ninety million, three hundred eighty-seven thousand, two hundred forty-nine".