690020073 has 32 divisors (see below), whose sum is σ = 1036824320. Its totient is φ = 453496320.

The previous prime is 690020063. The next prime is 690020087. The reversal of 690020073 is 370020096.

690020073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 690020073 - 2²⁸ = 421584617 is a prime.

It is a super-2 number, since 2×690020073² = 952255402285850658, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (690020003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1275183 + ... + 1275723.

It is an arithmetic number, because the mean of its divisors is an integer number (32400760).

Almost surely, 2^690020073 is an apocalyptic number.

It is an amenable number.

690020073 is a deficient number, since it is larger than the sum of its proper divisors (346804247).

690020073 is a wasteful number, since it uses less digits than its factorization.

690020073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134 (or 1128 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 690020073 is about 26268.2331533737. The cubic root of 690020073 is about 883.6641610552.

The spelling of 690020073 in words is "six hundred ninety million, twenty thousand, seventy-three".