994721423 has 2 divisors, whose sum is σ = 994721424. Its totient is φ = 994721422.

The previous prime is 994721417. The next prime is 994721461. The reversal of 994721423 is 324127499.

It is a weak prime.

It is an emirp because it is prime and its reverse (324127499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 994721423 - 2¹⁶ = 994655887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (994721473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497360711 + 497360712.

It is an arithmetic number, because the mean of its divisors is an integer number (497360712).

Almost surely, 2^994721423 is an apocalyptic number.

994721423 is a deficient number, since it is larger than the sum of its proper divisors (1).

994721423 is an equidigital number, since it uses as much as digits as its factorization.

994721423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 994721423 is about 31539.2045397470. The cubic root of 994721423 is about 998.2373692917.

The spelling of 994721423 in words is "nine hundred ninety-four million, seven hundred twenty-one thousand, four hundred twenty-three".