73402020401 has 2 divisors, whose sum is σ = 73402020402. Its totient is φ = 73402020400.

The previous prime is 73402020397. The next prime is 73402020457. The reversal of 73402020401 is 10402020437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68588991025 + 4813029376 = 261895^2 + 69376^2 .

It is an emirp because it is prime and its reverse (10402020437) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73402020401 - 2² = 73402020397 is a prime.

It is not a weakly prime, because it can be changed into another prime (73402022401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36701010200 + 36701010201.

It is an arithmetic number, because the mean of its divisors is an integer number (36701010201).

Almost surely, 2^73402020401 is an apocalyptic number.

It is an amenable number.

73402020401 is a deficient number, since it is larger than the sum of its proper divisors (1).

73402020401 is an equidigital number, since it uses as much as digits as its factorization.

73402020401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 23.

Adding to 73402020401 its reverse (10402020437), we get a palindrome (83804040838).

The spelling of 73402020401 in words is "seventy-three billion, four hundred two million, twenty thousand, four hundred one".