100234478 has 4 divisors (see below), whose sum is σ = 150351720. Its totient is φ = 50117238.

The previous prime is 100234447. The next prime is 100234493. The reversal of 100234478 is 874432001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874432001 = 53 ⋅16498717.

It is a self number, because there is not a number n which added to its sum of digits gives 100234478.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25058618 + ... + 25058621.

It is an arithmetic number, because the mean of its divisors is an integer number (37587930).

Almost surely, 2^100234478 is an apocalyptic number.

100234478 is a deficient number, since it is larger than the sum of its proper divisors (50117242).

100234478 is an equidigital number, since it uses as much as digits as its factorization.

100234478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50117241.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 100234478 is about 10011.7170355539. The cubic root of 100234478 is about 464.5213836698.

Adding to 100234478 its reverse (874432001), we get a palindrome (974666479).

The spelling of 100234478 in words is "one hundred million, two hundred thirty-four thousand, four hundred seventy-eight".