103406278 has 4 divisors (see below), whose sum is σ = 155109420. Its totient is φ = 51703138.

The previous prime is 103406269. The next prime is 103406279. The reversal of 103406278 is 872604301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 872604301 = 1213 ⋅719377.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103406279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25851568 + ... + 25851571.

It is an arithmetic number, because the mean of its divisors is an integer number (38777355).

Almost surely, 2^103406278 is an apocalyptic number.

103406278 is a deficient number, since it is larger than the sum of its proper divisors (51703142).

103406278 is an equidigital number, since it uses as much as digits as its factorization.

103406278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51703141.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 103406278 is about 10168.8877464549. The cubic root of 103406278 is about 469.3703322934.

It can be divided in two parts, 103406 and 278, that added together give a square (103684 = 322²).

The spelling of 103406278 in words is "one hundred three million, four hundred six thousand, two hundred seventy-eight".