73421399 has 2 divisors, whose sum is σ = 73421400. Its totient is φ = 73421398.

The previous prime is 73421371. The next prime is 73421437. The reversal of 73421399 is 99312437.

It is an a-pointer prime, because the next prime (73421437) can be obtained adding 73421399 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73421399 - 2²⁴ = 56644183 is a prime.

It is a super-2 number, since 2×73421399² = 10781403662234402, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73421899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36710699 + 36710700.

It is an arithmetic number, because the mean of its divisors is an integer number (36710700).

Almost surely, 2^73421399 is an apocalyptic number.

73421399 is a deficient number, since it is larger than the sum of its proper divisors (1).

73421399 is an equidigital number, since it uses as much as digits as its factorization.

73421399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 38.

The square root of 73421399 is about 8568.6287701125. The cubic root of 73421399 is about 418.7365640896.

The spelling of 73421399 in words is "seventy-three million, four hundred twenty-one thousand, three hundred ninety-nine".