207438993 has 12 divisors (see below), whose sum is σ = 301142400. Its totient is φ = 137596536.

The previous prime is 207438989. The next prime is 207438997. The reversal of 207438993 is 399834702.

It is a happy number.

207438993 is a `hidden beast` number, since 207 + 438 + 9 + 9 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (207438989) and next prime (207438997).

It is not a de Polignac number, because 207438993 - 2² = 207438989 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (207438997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56121 + ... + 59702.

It is an arithmetic number, because the mean of its divisors is an integer number (25095200).

Almost surely, 2^207438993 is an apocalyptic number.

It is an amenable number.

207438993 is a deficient number, since it is larger than the sum of its proper divisors (93703407).

207438993 is a wasteful number, since it uses less digits than its factorization.

207438993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116028 (or 116025 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 207438993 is about 14402.7425513338. The cubic root of 207438993 is about 591.9660478230.

The spelling of 207438993 in words is "two hundred seven million, four hundred thirty-eight thousand, nine hundred ninety-three".