101039399 has 4 divisors (see below), whose sum is σ = 101206464. Its totient is φ = 100872336.

The previous prime is 101039377. The next prime is 101039413. The reversal of 101039399 is 993930101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993930101 = 853 ⋅1165217.

It is a cyclic number.

It is not a de Polignac number, because 101039399 - 2¹² = 101035303 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 (101039599) 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, 82622 + ... + 83835.

It is an arithmetic number, because the mean of its divisors is an integer number (25301616).

Almost surely, 2^101039399 is an apocalyptic number.

101039399 is a deficient number, since it is larger than the sum of its proper divisors (167065).

101039399 is an equidigital number, since it uses as much as digits as its factorization.

101039399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167064.

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

The square root of 101039399 is about 10051.8356035104. The cubic root of 101039399 is about 465.7614978644.

The spelling of 101039399 in words is "one hundred one million, thirty-nine thousand, three hundred ninety-nine".