2141951389 has 4 divisors (see below), whose sum is σ = 2191764256. Its totient is φ = 2092138524.

The previous prime is 2141951353. The next prime is 2141951401. The reversal of 2141951389 is 9831591412.

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.

It is a cyclic number.

It is not a de Polignac number, because 2141951389 - 2²¹ = 2139854237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 49812823 = 2141951389 / (2 + 1 + 4 + 1 + 9 + 5 + 1 + 3 + 8 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2141951309) 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, 24906369 + ... + 24906454.

It is an arithmetic number, because the mean of its divisors is an integer number (547941064).

Almost surely, 2^2141951389 is an apocalyptic number.

It is an amenable number.

2141951389 is a deficient number, since it is larger than the sum of its proper divisors (49812867).

2141951389 is an equidigital number, since it uses as much as digits as its factorization.

2141951389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49812866.

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

The square root of 2141951389 is about 46281.2206947915. The cubic root of 2141951389 is about 1289.0503173918.

The spelling of 2141951389 in words is "two billion, one hundred forty-one million, nine hundred fifty-one thousand, three hundred eighty-nine".