4206639961 has 2 divisors, whose sum is σ = 4206639962. Its totient is φ = 4206639960.

The previous prime is 4206639887. The next prime is 4206639989. The reversal of 4206639961 is 1699366024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3650576400 + 556063561 = 60420^2 + 23581^2 .

It is a cyclic number.

It is not a de Polignac number, because 4206639961 - 2²¹ = 4204542809 is a prime.

It is a super-2 number, since 2×4206639961² = 35391639522964163042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4206639461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2103319980 + 2103319981.

It is an arithmetic number, because the mean of its divisors is an integer number (2103319981).

Almost surely, 2^4206639961 is an apocalyptic number.

It is an amenable number.

4206639961 is a deficient number, since it is larger than the sum of its proper divisors (1).

4206639961 is an equidigital number, since it uses as much as digits as its factorization.

4206639961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 46.

The square root of 4206639961 is about 64858.6151640628. The cubic root of 4206639961 is about 1614.2784446465.

The spelling of 4206639961 in words is "four billion, two hundred six million, six hundred thirty-nine thousand, nine hundred sixty-one".