73797421 has 2 divisors, whose sum is σ = 73797422. Its totient is φ = 73797420.

The previous prime is 73797419. The next prime is 73797457. The reversal of 73797421 is 12479737.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44756100 + 29041321 = 6690^2 + 5389^2 .

It is a cyclic number.

It is not a de Polignac number, because 73797421 - 2¹ = 73797419 is a prime.

Together with 73797419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73797401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36898710 + 36898711.

It is an arithmetic number, because the mean of its divisors is an integer number (36898711).

Almost surely, 2^73797421 is an apocalyptic number.

It is an amenable number.

73797421 is a deficient number, since it is larger than the sum of its proper divisors (1).

73797421 is an equidigital number, since it uses as much as digits as its factorization.

73797421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74088, while the sum is 40.

The square root of 73797421 is about 8590.5425323433. The cubic root of 73797421 is about 419.4501894913.

The spelling of 73797421 in words is "seventy-three million, seven hundred ninety-seven thousand, four hundred twenty-one".