207097381 has 8 divisors (see below), whose sum is σ = 214978680. Its totient is φ = 199265472.

The previous prime is 207097361. The next prime is 207097409. The reversal of 207097381 is 183790702.

It can be written as a sum of positive squares in 4 ways, for example, as 63457156 + 143640225 = 7966^2 + 11985^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 207097381 - 2¹⁹ = 206573093 is a prime.

It is a super-2 number, since 2×207097381² = 85778650434118322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 207097381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207097301) 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 7 ways as a sum of consecutive naturals, for example, 3690 + ... + 20683.

It is an arithmetic number, because the mean of its divisors is an integer number (26872335).

Almost surely, 2^207097381 is an apocalyptic number.

It is an amenable number.

207097381 is a deficient number, since it is larger than the sum of its proper divisors (7881299).

207097381 is a wasteful number, since it uses less digits than its factorization.

207097381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24695.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 207097381 is about 14390.8783957061. The cubic root of 207097381 is about 591.6409179916.

The spelling of 207097381 in words is "two hundred seven million, ninety-seven thousand, three hundred eighty-one".