693720073 has 2 divisors, whose sum is σ = 693720074. Its totient is φ = 693720072.

The previous prime is 693720031. The next prime is 693720091. The reversal of 693720073 is 370027396.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 543216249 + 150503824 = 23307^2 + 12268^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-693720073 is a prime.

It is not a weakly prime, because it can be changed into another prime (693720373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346860036 + 346860037.

It is an arithmetic number, because the mean of its divisors is an integer number (346860037).

Almost surely, 2^693720073 is an apocalyptic number.

It is an amenable number.

693720073 is a deficient number, since it is larger than the sum of its proper divisors (1).

693720073 is an equidigital number, since it uses as much as digits as its factorization.

693720073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 37.

The square root of 693720073 is about 26338.5662669782. The cubic root of 693720073 is about 885.2407967234.

The spelling of 693720073 in words is "six hundred ninety-three million, seven hundred twenty thousand, seventy-three".