100742399 has 4 divisors (see below), whose sum is σ = 100790136. Its totient is φ = 100694664.

The previous prime is 100742381. The next prime is 100742401. The reversal of 100742399 is 993247001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993247001 = 2311 ⋅429791.

It is a cyclic number.

It is not a de Polignac number, because 100742399 - 2¹² = 100738303 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 (100742309) 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, 20549 + ... + 24974.

It is an arithmetic number, because the mean of its divisors is an integer number (25197534).

Almost surely, 2^100742399 is an apocalyptic number.

100742399 is a deficient number, since it is larger than the sum of its proper divisors (47737).

100742399 is an equidigital number, since it uses as much as digits as its factorization.

100742399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47736.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 100742399 is about 10037.0513100213. The cubic root of 100742399 is about 465.3046895069.

The spelling of 100742399 in words is "one hundred million, seven hundred forty-two thousand, three hundred ninety-nine".