100723145 has 16 divisors (see below), whose sum is σ = 122245200. Its totient is φ = 79666944.

The previous prime is 100723127. The next prime is 100723163. The reversal of 100723145 is 541327001.

It is an interprime number because it is at equal distance from previous prime (100723127) and next prime (100723163).

It can be written as a sum of positive squares in 8 ways, for example, as 36675136 + 64048009 = 6056^2 + 8003^2 .

It is a cyclic number.

It is not a de Polignac number, because 100723145 - 2⁶ = 100723081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100723145.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 288431 + ... + 288779.

It is an arithmetic number, because the mean of its divisors is an integer number (7640325).

Almost surely, 2^100723145 is an apocalyptic number.

It is an amenable number.

100723145 is a deficient number, since it is larger than the sum of its proper divisors (21522055).

100723145 is a wasteful number, since it uses less digits than its factorization.

100723145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 100723145 is about 10036.0921179511. The cubic root of 100723145 is about 465.2750444340.

The spelling of 100723145 in words is "one hundred million, seven hundred twenty-three thousand, one hundred forty-five".