101778423 has 16 divisors (see below), whose sum is σ = 137464800. Its totient is φ = 66977280.

The previous prime is 101778419. The next prime is 101778433. The reversal of 101778423 is 324877101.

It is a happy number.

It is not a de Polignac number, because 101778423 - 2² = 101778419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101778433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133363 + ... + 134123.

It is an arithmetic number, because the mean of its divisors is an integer number (8591550).

Almost surely, 2^101778423 is an apocalyptic number.

101778423 is a deficient number, since it is larger than the sum of its proper divisors (35686377).

101778423 is a wasteful number, since it uses less digits than its factorization.

101778423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 101778423 is about 10088.5292783438. The cubic root of 101778423 is about 466.8943005664.

It can be divided in two parts, 101778 and 423, that added together give a palindrome (102201).

The spelling of 101778423 in words is "one hundred one million, seven hundred seventy-eight thousand, four hundred twenty-three".