209794074 has 16 divisors (see below), whose sum is σ = 479529408. Its totient is φ = 59941152.

The previous prime is 209794051. The next prime is 209794111. The reversal of 209794074 is 470497902.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 4995097 = 209794074 / (2 + 0 + 9 + 7 + 9 + 4 + 0 + 7 + 4).

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, 2497507 + ... + 2497590.

It is an arithmetic number, because the mean of its divisors is an integer number (29970588).

Almost surely, 2^209794074 is an apocalyptic number.

209794074 is an abundant number, since it is smaller than the sum of its proper divisors (269735334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209794074 is a wasteful number, since it uses less digits than its factorization.

209794074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4995109.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 209794074 is about 14484.2698814956. The cubic root of 209794074 is about 594.1978447402.

The spelling of 209794074 in words is "two hundred nine million, seven hundred ninety-four thousand, seventy-four".