609892421 has 2 divisors, whose sum is σ = 609892422. Its totient is φ = 609892420.

The previous prime is 609892399. The next prime is 609892471. The reversal of 609892421 is 124298906.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 580135396 + 29757025 = 24086^2 + 5455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-609892421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (609892471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304946210 + 304946211.

It is an arithmetic number, because the mean of its divisors is an integer number (304946211).

Almost surely, 2^609892421 is an apocalyptic number.

It is an amenable number.

609892421 is a deficient number, since it is larger than the sum of its proper divisors (1).

609892421 is an equidigital number, since it uses as much as digits as its factorization.

609892421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 609892421 is about 24696.0001012310. Note that the first 3 decimals coincide. The cubic root of 609892421 is about 848.0427496582.

The spelling of 609892421 in words is "six hundred nine million, eight hundred ninety-two thousand, four hundred twenty-one".