1650890149 has 4 divisors (see below), whose sum is σ = 1651042764. Its totient is φ = 1650737536.

The previous prime is 1650890081. The next prime is 1650890177. The reversal of 1650890149 is 9410980561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9410980561 = 19699 ⋅477739.

It can be written as a sum of positive squares in 2 ways, for example, as 373185124 + 1277705025 = 19318^2 + 35745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1650890149 - 2¹⁵ = 1650857381 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 (1650894149) 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, 58732 + ... + 82165.

It is an arithmetic number, because the mean of its divisors is an integer number (412760691).

Almost surely, 2^1650890149 is an apocalyptic number.

It is an amenable number.

1650890149 is a deficient number, since it is larger than the sum of its proper divisors (152615).

1650890149 is a wasteful number, since it uses less digits than its factorization.

1650890149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152614.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 1650890149 is about 40631.1475225596. The cubic root of 1650890149 is about 1181.8782089501.

The spelling of 1650890149 in words is "one billion, six hundred fifty million, eight hundred ninety thousand, one hundred forty-nine".