101930639 has 4 divisors (see below), whose sum is σ = 104099424. Its totient is φ = 99761856.

The previous prime is 101930629. The next prime is 101930663. The reversal of 101930639 is 936039101.

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

It is a cyclic number.

It is not a de Polignac number, because 101930639 - 2²⁴ = 85153423 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 (101930629) 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, 1084322 + ... + 1084415.

It is an arithmetic number, because the mean of its divisors is an integer number (26024856).

Almost surely, 2^101930639 is an apocalyptic number.

101930639 is a deficient number, since it is larger than the sum of its proper divisors (2168785).

101930639 is an equidigital number, since it uses as much as digits as its factorization.

101930639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2168784.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 101930639 is about 10096.0704732089. The cubic root of 101930639 is about 467.1269411756.

The spelling of 101930639 in words is "one hundred one million, nine hundred thirty thousand, six hundred thirty-nine".