145809769 has 8 divisors (see below), whose sum is σ = 167356800. Its totient is φ = 124442016.

The previous prime is 145809751. The next prime is 145809773. The reversal of 145809769 is 967908541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145809769 - 2⁵ = 145809737 is a prime.

It is a super-2 number, since 2×145809769² = 42520977471666722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145809739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43069 + ... + 46330.

It is an arithmetic number, because the mean of its divisors is an integer number (20919600).

Almost surely, 2^145809769 is an apocalyptic number.

It is an amenable number.

145809769 is a deficient number, since it is larger than the sum of its proper divisors (21547031).

145809769 is an equidigital number, since it uses as much as digits as its factorization.

145809769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89639.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 145809769 is about 12075.1715929837. The cubic root of 145809769 is about 526.3349476484.

The spelling of 145809769 in words is "one hundred forty-five million, eight hundred nine thousand, seven hundred sixty-nine".