4951813 has 2 divisors, whose sum is σ = 4951814. Its totient is φ = 4951812.

The previous prime is 4951789. The next prime is 4951819. The reversal of 4951813 is 3181594.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4656964 + 294849 = 2158^2 + 543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4951813 is a prime.

4951813 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4951819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2475906 + 2475907.

It is an arithmetic number, because the mean of its divisors is an integer number (2475907).

Almost surely, 2^4951813 is an apocalyptic number.

It is an amenable number.

4951813 is a deficient number, since it is larger than the sum of its proper divisors (1).

4951813 is an equidigital number, since it uses as much as digits as its factorization.

4951813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 31.

The square root of 4951813 is about 2225.2669502781. The cubic root of 4951813 is about 170.4464964000.

The spelling of 4951813 in words is "four million, nine hundred fifty-one thousand, eight hundred thirteen".