145903837 has 4 divisors (see below), whose sum is σ = 145939420. Its totient is φ = 145868256.

The previous prime is 145903819. The next prime is 145903847. The reversal of 145903837 is 738309541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8099716 + 137804121 = 2846^2 + 11739^2 .

It is a cyclic number.

It is not a de Polignac number, because 145903837 - 2²⁷ = 11686109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145903837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145903817) 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 3 ways as a sum of consecutive naturals, for example, 10698 + ... + 20155.

It is an arithmetic number, because the mean of its divisors is an integer number (36484855).

Almost surely, 2^145903837 is an apocalyptic number.

It is an amenable number.

145903837 is a deficient number, since it is larger than the sum of its proper divisors (35583).

145903837 is an equidigital number, since it uses as much as digits as its factorization.

145903837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35582.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 145903837 is about 12079.0660648909. The cubic root of 145903837 is about 526.4481102363.

The spelling of 145903837 in words is "one hundred forty-five million, nine hundred three thousand, eight hundred thirty-seven".