92742821 has 2 divisors, whose sum is σ = 92742822. Its totient is φ = 92742820.

The previous prime is 92742799. The next prime is 92742823. The reversal of 92742821 is 12824729.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89094721 + 3648100 = 9439^2 + 1910^2 .

It is an emirp because it is prime and its reverse (12824729) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 92742821 - 2²⁶ = 25633957 is a prime.

Together with 92742823, 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 (92742823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46371410 + 46371411.

It is an arithmetic number, because the mean of its divisors is an integer number (46371411).

Almost surely, 2^92742821 is an apocalyptic number.

It is an amenable number.

92742821 is a deficient number, since it is larger than the sum of its proper divisors (1).

92742821 is an equidigital number, since it uses as much as digits as its factorization.

92742821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 92742821 is about 9630.3074198075. The cubic root of 92742821 is about 452.6474734769.

The spelling of 92742821 in words is "ninety-two million, seven hundred forty-two thousand, eight hundred twenty-one".