190605649 has 16 divisors (see below), whose sum is σ = 221456592. Its totient is φ = 162459648.

The previous prime is 190605647. The next prime is 190605659. The reversal of 190605649 is 946506091.

190605649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 24324624 + 166281025 = 4932^2 + 12895^2 .

It is not a de Polignac number, because 190605649 - 2¹ = 190605647 is a prime.

It is a super-2 number, since 2×190605649² = 72661026861422402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190605643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3577 + ... + 19849.

It is an arithmetic number, because the mean of its divisors is an integer number (13841037).

Almost surely, 2^190605649 is an apocalyptic number.

It is an amenable number.

190605649 is a deficient number, since it is larger than the sum of its proper divisors (30850943).

190605649 is a wasteful number, since it uses less digits than its factorization.

190605649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16356.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 190605649 is about 13806.0004708098. Note that the first 3 decimals coincide. The cubic root of 190605649 is about 575.4999045139.

The spelling of 190605649 in words is "one hundred ninety million, six hundred five thousand, six hundred forty-nine".