190451139 has 4 divisors (see below), whose sum is σ = 253934856. Its totient is φ = 126967424.

The previous prime is 190451083. The next prime is 190451141. The reversal of 190451139 is 931154091.

190451139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 190451139 - 2¹⁶ = 190385603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (190451939) 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, 31741854 + ... + 31741859.

It is an arithmetic number, because the mean of its divisors is an integer number (63483714).

Almost surely, 2^190451139 is an apocalyptic number.

190451139 is a deficient number, since it is larger than the sum of its proper divisors (63483717).

190451139 is an equidigital number, since it uses as much as digits as its factorization.

190451139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63483716.

The product of its (nonzero) digits is 4860, while the sum is 33.

The square root of 190451139 is about 13800.4035810552. The cubic root of 190451139 is about 575.3443573084.

The spelling of 190451139 in words is "one hundred ninety million, four hundred fifty-one thousand, one hundred thirty-nine".