69628973 has 2 divisors, whose sum is σ = 69628974. Its totient is φ = 69628972.

The previous prime is 69628967. The next prime is 69629003. The reversal of 69628973 is 37982696.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45941284 + 23687689 = 6778^2 + 4867^2 .

It is a cyclic number.

It is not a de Polignac number, because 69628973 - 2⁸ = 69628717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69621973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34814486 + 34814487.

It is an arithmetic number, because the mean of its divisors is an integer number (34814487).

Almost surely, 2^69628973 is an apocalyptic number.

It is an amenable number.

69628973 is a deficient number, since it is larger than the sum of its proper divisors (1).

69628973 is an equidigital number, since it uses as much as digits as its factorization.

69628973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 50.

The square root of 69628973 is about 8344.3977014522. The cubic root of 69628973 is about 411.3990929687.

The spelling of 69628973 in words is "sixty-nine million, six hundred twenty-eight thousand, nine hundred seventy-three".