199370945 has 8 divisors (see below), whose sum is σ = 244335744. Its totient is φ = 156103024.

The previous prime is 199370939. The next prime is 199370981. The reversal of 199370945 is 549073991.

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 199370945 - 2⁶ = 199370881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 199370945.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423959 + ... + 424428.

It is an arithmetic number, because the mean of its divisors is an integer number (30541968).

Almost surely, 2^199370945 is an apocalyptic number.

It is an amenable number.

199370945 is a deficient number, since it is larger than the sum of its proper divisors (44964799).

199370945 is an equidigital number, since it uses as much as digits as its factorization.

199370945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848439.

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 199370945 is about 14119.8776552773. The cubic root of 199370945 is about 584.1897810444.

The spelling of 199370945 in words is "one hundred ninety-nine million, three hundred seventy thousand, nine hundred forty-five".