146820069 has 36 divisors (see below), whose sum is σ = 241195500. Its totient is φ = 85895040.

The previous prime is 146820067. The next prime is 146820071. The reversal of 146820069 is 960028641.

It is an interprime number because it is at equal distance from previous prime (146820067) and next prime (146820071).

It can be written as a sum of positive squares in 2 ways, for example, as 118592100 + 28227969 = 10890^2 + 5313^2 .

It is not a de Polignac number, because 146820069 - 2¹ = 146820067 is a prime.

It is a super-2 number, since 2×146820069² = 43112265322329522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146820067) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 29257 + ... + 33905.

It is an arithmetic number, because the mean of its divisors is an integer number (6699875).

Almost surely, 2^146820069 is an apocalyptic number.

It is an amenable number.

146820069 is a deficient number, since it is larger than the sum of its proper divisors (94375431).

146820069 is a wasteful number, since it uses less digits than its factorization.

146820069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4706 (or 4692 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 146820069 is about 12116.9331515858. The cubic root of 146820069 is about 527.5477898947.

The spelling of 146820069 in words is "one hundred forty-six million, eight hundred twenty thousand, sixty-nine".