1890826149 has 4 divisors (see below), whose sum is σ = 2521101536. Its totient is φ = 1260550764.

The previous prime is 1890826127. The next prime is 1890826169. The reversal of 1890826149 is 9416280981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9416280981 = 3 ⋅3138760327.

It is not a de Polignac number, because 1890826149 - 2⁵ = 1890826117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1890826098 and 1890826107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890826109) 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, 315137689 + ... + 315137694.

It is an arithmetic number, because the mean of its divisors is an integer number (630275384).

Almost surely, 2^1890826149 is an apocalyptic number.

It is an amenable number.

1890826149 is a deficient number, since it is larger than the sum of its proper divisors (630275387).

1890826149 is an equidigital number, since it uses as much as digits as its factorization.

1890826149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630275386.

The product of its (nonzero) digits is 248832, while the sum is 48.

The square root of 1890826149 is about 43483.6308166648. The cubic root of 1890826149 is about 1236.5657116226.

The spelling of 1890826149 in words is "one billion, eight hundred ninety million, eight hundred twenty-six thousand, one hundred forty-nine".