101400639 has 8 divisors (see below), whose sum is σ = 136174080. Its totient is φ = 67113816.

The previous prime is 101400619. The next prime is 101400647. The reversal of 101400639 is 936004101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 101400639 - 2¹⁶ = 101335103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101400619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121167 + ... + 122000.

It is an arithmetic number, because the mean of its divisors is an integer number (17021760).

Almost surely, 2^101400639 is an apocalyptic number.

101400639 is a deficient number, since it is larger than the sum of its proper divisors (34773441).

101400639 is a wasteful number, since it uses less digits than its factorization.

101400639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243309.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 101400639 is about 10069.7884287606. The cubic root of 101400639 is about 466.3159072307.

The spelling of 101400639 in words is "one hundred one million, four hundred thousand, six hundred thirty-nine".