623690973 has 6 divisors (see below), whose sum is σ = 900886974. Its totient is φ = 415793976.

The previous prime is 623690933. The next prime is 623690983. The reversal of 623690973 is 379096326.

623690973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 576864324 + 46826649 = 24018^2 + 6843^2 .

It is not a de Polignac number, because 623690973 - 2⁹ = 623690461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623690933) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34649490 + ... + 34649507.

It is an arithmetic number, because the mean of its divisors is an integer number (150147829).

Almost surely, 2^623690973 is an apocalyptic number.

It is an amenable number.

623690973 is a deficient number, since it is larger than the sum of its proper divisors (277196001).

623690973 is a wasteful number, since it uses less digits than its factorization.

623690973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69299003 (or 69299000 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 45.

The square root of 623690973 is about 24973.8057372119. The cubic root of 623690973 is about 854.3906482073.

The spelling of 623690973 in words is "six hundred twenty-three million, six hundred ninety thousand, nine hundred seventy-three".