100139993 has 2 divisors, whose sum is σ = 100139994. Its totient is φ = 100139992.

The previous prime is 100139981. The next prime is 100140011. The reversal of 100139993 is 399931001.

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., 87086224 + 13053769 = 9332^2 + 3613^2 .

It is a cyclic number.

It is not a de Polignac number, because 100139993 - 2²⁴ = 83362777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100139903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50069996 + 50069997.

It is an arithmetic number, because the mean of its divisors is an integer number (50069997).

Almost surely, 2^100139993 is an apocalyptic number.

It is an amenable number.

100139993 is a deficient number, since it is larger than the sum of its proper divisors (1).

100139993 is an equidigital number, since it uses as much as digits as its factorization.

100139993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6561, while the sum is 35.

The square root of 100139993 is about 10006.9972019582. The cubic root of 100139993 is about 464.3753790150.

The spelling of 100139993 in words is "one hundred million, one hundred thirty-nine thousand, nine hundred ninety-three".