145684899 has 20 divisors (see below), whose sum is σ = 219106800. Its totient is φ = 96463440.

The previous prime is 145684879. The next prime is 145684907. The reversal of 145684899 is 998486541.

It is a Cunningham number, because it is equal to 12070²-1.

It is not a de Polignac number, because 145684899 - 2²⁴ = 128907683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145684879) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6034 + ... + 18104.

It is an arithmetic number, because the mean of its divisors is an integer number (10955340).

Almost surely, 2^145684899 is an apocalyptic number.

145684899 is a deficient number, since it is larger than the sum of its proper divisors (73421901).

145684899 is a wasteful number, since it uses less digits than its factorization.

145684899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12232 (or 12223 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 145684899 is about 12069.9999585750. Note that the first 4 decimals coincide. The cubic root of 145684899 is about 526.1846554425.

The spelling of 145684899 in words is "one hundred forty-five million, six hundred eighty-four thousand, eight hundred ninety-nine".