206971974 has 72 divisors (see below), whose sum is σ = 519819768. Its totient is φ = 59013120.

The previous prime is 206971937. The next prime is 206971979. The reversal of 206971974 is 479179602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206971979) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 55414 + ... + 59030.

It is an arithmetic number, because the mean of its divisors is an integer number (7219719).

Almost surely, 2^206971974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206971974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259909884).

206971974 is an abundant number, since it is smaller than the sum of its proper divisors (312847794).

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

206971974 is a wasteful number, since it uses less digits than its factorization.

206971974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3670 (or 3650 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 206971974 is about 14386.5205661411. The cubic root of 206971974 is about 591.5214719390.

The spelling of 206971974 in words is "two hundred six million, nine hundred seventy-one thousand, nine hundred seventy-four".