4000699961 has 2 divisors, whose sum is σ = 4000699962. Its totient is φ = 4000699960.

The previous prime is 4000699939. The next prime is 4000699979. The reversal of 4000699961 is 1699960004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2190708025 + 1809991936 = 46805^2 + 42544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4000699961 is a prime.

It is not a weakly prime, because it can be changed into another prime (4000699861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000349980 + 2000349981.

It is an arithmetic number, because the mean of its divisors is an integer number (2000349981).

Almost surely, 2^4000699961 is an apocalyptic number.

It is an amenable number.

4000699961 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000699961 is an equidigital number, since it uses as much as digits as its factorization.

4000699961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 4000699961 is about 63251.0866388871. The cubic root of 4000699961 is about 1587.4936398034.

The spelling of 4000699961 in words is "four billion, six hundred ninety-nine thousand, nine hundred sixty-one".