4999961 has 2 divisors, whose sum is σ = 4999962. Its totient is φ = 4999960.

The previous prime is 4999957. The next prime is 4999963. The reversal of 4999961 is 1699994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4596736 + 403225 = 2144^2 + 635^2 .

It is a cyclic number.

It is not a de Polignac number, because 4999961 - 2² = 4999957 is a prime.

It is a super-2 number, since 2×4999961² = 49999220003042, which contains 22 as substring.

Together with 4999963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4999963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499980 + 2499981.

It is an arithmetic number, because the mean of its divisors is an integer number (2499981).

Almost surely, 2^4999961 is an apocalyptic number.

It is an amenable number.

4999961 is a deficient number, since it is larger than the sum of its proper divisors (1).

4999961 is an equidigital number, since it uses as much as digits as its factorization.

4999961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157464, while the sum is 47.

The square root of 4999961 is about 2236.0592568177. The cubic root of 4999961 is about 170.9971500728.

The spelling of 4999961 in words is "four million, nine hundred ninety-nine thousand, nine hundred sixty-one".