73897553 has 2 divisors, whose sum is σ = 73897554. Its totient is φ = 73897552.

The previous prime is 73897519. The next prime is 73897561. The reversal of 73897553 is 35579837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71098624 + 2798929 = 8432^2 + 1673^2 .

It is a cyclic number.

It is not a de Polignac number, because 73897553 - 2²⁴ = 57120337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 73897498 and 73897507.

It is not a weakly prime, because it can be changed into another prime (73897513) 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, 36948776 + 36948777.

It is an arithmetic number, because the mean of its divisors is an integer number (36948777).

Almost surely, 2^73897553 is an apocalyptic number.

It is an amenable number.

73897553 is a deficient number, since it is larger than the sum of its proper divisors (1).

73897553 is an equidigital number, since it uses as much as digits as its factorization.

73897553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 793800, while the sum is 47.

The square root of 73897553 is about 8596.3685937726. The cubic root of 73897553 is about 419.6398140249.

It can be divided in two parts, 738975 and 53, that multiplied together give a triangular number (39165675 = T₈₈₅₀).

The spelling of 73897553 in words is "seventy-three million, eight hundred ninety-seven thousand, five hundred fifty-three".