101993399 has 4 divisors (see below), whose sum is σ = 102237240. Its totient is φ = 101749560.

The previous prime is 101993393. The next prime is 101993429. The reversal of 101993399 is 993399101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101993399 is a prime.

It is a super-3 number, since 3×101993399³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101993393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121292 + ... + 122129.

It is an arithmetic number, because the mean of its divisors is an integer number (25559310).

Almost surely, 2^101993399 is an apocalyptic number.

101993399 is a deficient number, since it is larger than the sum of its proper divisors (243841).

101993399 is an equidigital number, since it uses as much as digits as its factorization.

101993399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243840.

The product of its (nonzero) digits is 59049, while the sum is 44.

The square root of 101993399 is about 10099.1781348781. The cubic root of 101993399 is about 467.2227935194. Note that the first 3 decimals are identical.

The spelling of 101993399 in words is "one hundred one million, nine hundred ninety-three thousand, three hundred ninety-nine".