492311861 has 2 divisors, whose sum is σ = 492311862. Its totient is φ = 492311860.

The previous prime is 492311839. The next prime is 492311863. The reversal of 492311861 is 168113294.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 458602225 + 33709636 = 21415^2 + 5806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-492311861 is a prime.

Together with 492311863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (492311863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246155930 + 246155931.

It is an arithmetic number, because the mean of its divisors is an integer number (246155931).

Almost surely, 2^492311861 is an apocalyptic number.

It is an amenable number.

492311861 is a deficient number, since it is larger than the sum of its proper divisors (1).

492311861 is an equidigital number, since it uses as much as digits as its factorization.

492311861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 492311861 is about 22188.1017890220. The cubic root of 492311861 is about 789.6114422063.

The spelling of 492311861 in words is "four hundred ninety-two million, three hundred eleven thousand, eight hundred sixty-one".