2189404951 has 2 divisors, whose sum is σ = 2189404952. Its totient is φ = 2189404950.

The previous prime is 2189404933. The next prime is 2189404963. The reversal of 2189404951 is 1594049812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2189404951 - 2²⁵ = 2155850519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2189404898 and 2189404907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2189414951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094702475 + 1094702476.

It is an arithmetic number, because the mean of its divisors is an integer number (1094702476).

Almost surely, 2^2189404951 is an apocalyptic number.

2189404951 is a deficient number, since it is larger than the sum of its proper divisors (1).

2189404951 is an equidigital number, since it uses as much as digits as its factorization.

2189404951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 2189404951 is about 46791.0776858153. The cubic root of 2189404951 is about 1298.5002331560.

The spelling of 2189404951 in words is "two billion, one hundred eighty-nine million, four hundred four thousand, nine hundred fifty-one".