207740057 has 6 divisors (see below), whose sum is σ = 241656858. Its totient is φ = 178062864.

The previous prime is 207740041. The next prime is 207740069. The reversal of 207740057 is 750047702.

It is a happy number.

207740057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 185940496 + 21799561 = 13636^2 + 4669^2 .

It is not a de Polignac number, because 207740057 - 2⁴ = 207740041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (207740257) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2119748 + ... + 2119845.

It is an arithmetic number, because the mean of its divisors is an integer number (40276143).

Almost surely, 2^207740057 is an apocalyptic number.

It is an amenable number.

207740057 is a deficient number, since it is larger than the sum of its proper divisors (33916801).

207740057 is an equidigital number, since it uses as much as digits as its factorization.

207740057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4239607 (or 4239600 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 32.

The square root of 207740057 is about 14413.1903824240. The cubic root of 207740057 is about 592.2522902408.

Adding to 207740057 its reverse (750047702), we get a palindrome (957787759).

The spelling of 207740057 in words is "two hundred seven million, seven hundred forty thousand, fifty-seven".