209473972 has 24 divisors (see below), whose sum is σ = 383031936. Its totient is φ = 100048608.

The previous prime is 209473963. The next prime is 209473981. The reversal of 209473972 is 279374902.

It is a happy number.

209473972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (209473963) and next prime (209473981).

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 116593 + ... + 118375.

It is an arithmetic number, because the mean of its divisors is an integer number (15959664).

Almost surely, 2^209473972 is an apocalyptic number.

It is an amenable number.

209473972 is a deficient number, since it is larger than the sum of its proper divisors (173557964).

209473972 is a wasteful number, since it uses less digits than its factorization.

209473972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3087 (or 3085 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 209473972 is about 14473.2156758614. The cubic root of 209473972 is about 593.8954835817.

The spelling of 209473972 in words is "two hundred nine million, four hundred seventy-three thousand, nine hundred seventy-two".