207861961 has 2 divisors, whose sum is σ = 207861962. Its totient is φ = 207861960.

The previous prime is 207861917. The next prime is 207861991. The reversal of 207861961 is 169168702.

207861961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132710400 + 75151561 = 11520^2 + 8669^2 .

It is a cyclic number.

It is not a de Polignac number, because 207861961 - 2¹⁷ = 207730889 is a prime.

It is not a weakly prime, because it can be changed into another prime (207861911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103930980 + 103930981.

It is an arithmetic number, because the mean of its divisors is an integer number (103930981).

Almost surely, 2^207861961 is an apocalyptic number.

It is an amenable number.

207861961 is a deficient number, since it is larger than the sum of its proper divisors (1).

207861961 is an equidigital number, since it uses as much as digits as its factorization.

207861961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 207861961 is about 14417.4186663217. The cubic root of 207861961 is about 592.3681141647.

The spelling of 207861961 in words is "two hundred seven million, eight hundred sixty-one thousand, nine hundred sixty-one".