105156999 has 6 divisors (see below), whose sum is σ = 151893456. Its totient is φ = 70104660.

The previous prime is 105156967. The next prime is 105157007. The reversal of 105156999 is 999651501.

It is a happy number.

It is not a de Polignac number, because 105156999 - 2⁵ = 105156967 is a prime.

It is a super-2 number, since 2×105156999² = 22115988877372002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105156599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5842047 + ... + 5842064.

It is an arithmetic number, because the mean of its divisors is an integer number (25315576).

Almost surely, 2^105156999 is an apocalyptic number.

105156999 is a deficient number, since it is larger than the sum of its proper divisors (46736457).

105156999 is a wasteful number, since it uses less digits than its factorization.

105156999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11684117 (or 11684114 counting only the distinct ones).

The product of its (nonzero) digits is 109350, while the sum is 45.

The square root of 105156999 is about 10254.6086712268. The cubic root of 105156999 is about 472.0044152967.

The spelling of 105156999 in words is "one hundred five million, one hundred fifty-six thousand, nine hundred ninety-nine".