2149690445 has 8 divisors (see below), whose sum is σ = 2948146944. Its totient is φ = 1474073424.

The previous prime is 2149690399. The next prime is 2149690451. The reversal of 2149690445 is 5440969412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2149690445 - 2⁸ = 2149690189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2149690396 and 2149690405.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 30709829 + ... + 30709898.

It is an arithmetic number, because the mean of its divisors is an integer number (368518368).

Almost surely, 2^2149690445 is an apocalyptic number.

It is an amenable number.

2149690445 is a deficient number, since it is larger than the sum of its proper divisors (798456499).

2149690445 is an equidigital number, since it uses as much as digits as its factorization.

2149690445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61419739.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 2149690445 is about 46364.7543399078. The cubic root of 2149690445 is about 1290.6009348873.

The spelling of 2149690445 in words is "two billion, one hundred forty-nine million, six hundred ninety thousand, four hundred forty-five".