206927421 has 16 divisors (see below), whose sum is σ = 284828544. Its totient is φ = 133527744.

The previous prime is 206927411. The next prime is 206927431. The reversal of 206927421 is 124729602.

It is an interprime number because it is at equal distance from previous prime (206927411) and next prime (206927431).

It is not a de Polignac number, because 206927421 - 2⁷ = 206927293 is a prime.

It is a super-2 number, since 2×206927421² = 85637915123422482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206927411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17136 + ... + 26598.

It is an arithmetic number, because the mean of its divisors is an integer number (17801784).

Almost surely, 2^206927421 is an apocalyptic number.

It is an amenable number.

206927421 is a deficient number, since it is larger than the sum of its proper divisors (77901123).

206927421 is a wasteful number, since it uses less digits than its factorization.

206927421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9700.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 206927421 is about 14384.9720541960. The cubic root of 206927421 is about 591.4790250530.

The spelling of 206927421 in words is "two hundred six million, nine hundred twenty-seven thousand, four hundred twenty-one".