101938399 has 4 divisors (see below), whose sum is σ = 102077080. Its totient is φ = 101799720.

The previous prime is 101938351. The next prime is 101938411. The reversal of 101938399 is 993839101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993839101 = 5897 ⋅168533.

It is a cyclic number.

It is not a de Polignac number, because 101938399 - 2¹⁵ = 101905631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101938349) 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, 68232 + ... + 69709.

It is an arithmetic number, because the mean of its divisors is an integer number (25519270).

Almost surely, 2^101938399 is an apocalyptic number.

101938399 is a deficient number, since it is larger than the sum of its proper divisors (138681).

101938399 is an equidigital number, since it uses as much as digits as its factorization.

101938399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138680.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 101938399 is about 10096.4547738303. The cubic root of 101938399 is about 467.1387950307.

The spelling of 101938399 in words is "one hundred one million, nine hundred thirty-eight thousand, three hundred ninety-nine".