109021973 has 2 divisors, whose sum is σ = 109021974. Its totient is φ = 109021972.

The previous prime is 109021961. The next prime is 109022027. The reversal of 109021973 is 379120901.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105308644 + 3713329 = 10262^2 + 1927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109021973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109021903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54510986 + 54510987.

It is an arithmetic number, because the mean of its divisors is an integer number (54510987).

Almost surely, 2^109021973 is an apocalyptic number.

It is an amenable number.

109021973 is a deficient number, since it is larger than the sum of its proper divisors (1).

109021973 is an equidigital number, since it uses as much as digits as its factorization.

109021973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 109021973 is about 10441.3587717308. The cubic root of 109021973 is about 477.7177143753.

The spelling of 109021973 in words is "one hundred nine million, twenty-one thousand, nine hundred seventy-three".