1950489121 has 4 divisors (see below), whose sum is σ = 2229130432. Its totient is φ = 1671847812.

The previous prime is 1950489103. The next prime is 1950489131. The reversal of 1950489121 is 1219840591.

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: 1219840591 = 587 ⋅2078093.

It is a cyclic number.

It is not a de Polignac number, because 1950489121 - 2⁷ = 1950488993 is a prime.

It is a super-2 number, since 2×1950489121² = 7608815622278705282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1950489131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139320645 + ... + 139320658.

It is an arithmetic number, because the mean of its divisors is an integer number (557282608).

Almost surely, 2^1950489121 is an apocalyptic number.

It is an amenable number.

1950489121 is a deficient number, since it is larger than the sum of its proper divisors (278641311).

1950489121 is an equidigital number, since it uses as much as digits as its factorization.

1950489121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278641310.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 1950489121 is about 44164.3421891462. The cubic root of 1950489121 is about 1249.4374259930.

The spelling of 1950489121 in words is "one billion, nine hundred fifty million, four hundred eighty-nine thousand, one hundred twenty-one".