206990715 has 16 divisors (see below), whose sum is σ = 332257536. Its totient is φ = 110037600.

The previous prime is 206990701. The next prime is 206990717. The reversal of 206990715 is 517099602.

It is not a de Polignac number, because 206990715 - 2⁷ = 206990587 is a prime.

It is a super-2 number, since 2×206990715² = 85690312192422450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206990717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17521 + ... + 26850.

It is an arithmetic number, because the mean of its divisors is an integer number (20766096).

Almost surely, 2^206990715 is an apocalyptic number.

206990715 is a deficient number, since it is larger than the sum of its proper divisors (125266821).

206990715 is a wasteful number, since it uses less digits than its factorization.

206990715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44690.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 206990715 is about 14387.1718902639. The cubic root of 206990715 is about 591.5393251925.

The spelling of 206990715 in words is "two hundred six million, nine hundred ninety thousand, seven hundred fifteen".