73036421 has 2 divisors, whose sum is σ = 73036422. Its totient is φ = 73036420.

The previous prime is 73036417. The next prime is 73036501. The reversal of 73036421 is 12463037.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57912100 + 15124321 = 7610^2 + 3889^2 .

It is a cyclic number.

It is not a de Polignac number, because 73036421 - 2² = 73036417 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73036121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36518210 + 36518211.

It is an arithmetic number, because the mean of its divisors is an integer number (36518211).

Almost surely, 2^73036421 is an apocalyptic number.

It is an amenable number.

73036421 is a deficient number, since it is larger than the sum of its proper divisors (1).

73036421 is an equidigital number, since it uses as much as digits as its factorization.

73036421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 73036421 is about 8546.1348573493. The cubic root of 73036421 is about 418.0034129740.

Adding to 73036421 its reverse (12463037), we get a palindrome (85499458).

The spelling of 73036421 in words is "seventy-three million, thirty-six thousand, four hundred twenty-one".