493792921 has 2 divisors, whose sum is σ = 493792922. Its totient is φ = 493792920.

The previous prime is 493792903. The next prime is 493792933. The reversal of 493792921 is 129297394.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 455352921 + 38440000 = 21339^2 + 6200^2 .

It is a cyclic number.

It is not a de Polignac number, because 493792921 - 2¹⁷ = 493661849 is a prime.

It is not a weakly prime, because it can be changed into another prime (493793921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246896460 + 246896461.

It is an arithmetic number, because the mean of its divisors is an integer number (246896461).

Almost surely, 2^493792921 is an apocalyptic number.

It is an amenable number.

493792921 is a deficient number, since it is larger than the sum of its proper divisors (1).

493792921 is an equidigital number, since it uses as much as digits as its factorization.

493792921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 46.

The square root of 493792921 is about 22221.4518202569. The cubic root of 493792921 is about 790.4024659750.

The spelling of 493792921 in words is "four hundred ninety-three million, seven hundred ninety-two thousand, nine hundred twenty-one".