145819769 has 4 divisors (see below), whose sum is σ = 145886196. Its totient is φ = 145753344.

The previous prime is 145819759. The next prime is 145819771. The reversal of 145819769 is 967918541.

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 139122025 + 6697744 = 11795^2 + 2588^2 .

It is a cyclic number.

It is not a de Polignac number, because 145819769 - 2¹² = 145815673 is a prime.

It is a super-2 number, since 2×145819769² = 42526810062426722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145819759) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 29804 + ... + 34349.

It is an arithmetic number, because the mean of its divisors is an integer number (36471549).

Almost surely, 2^145819769 is an apocalyptic number.

It is an amenable number.

145819769 is a deficient number, since it is larger than the sum of its proper divisors (66427).

145819769 is an equidigital number, since it uses as much as digits as its factorization.

145819769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66426.

The product of its digits is 544320, while the sum is 50.

The square root of 145819769 is about 12075.5856586751. The cubic root of 145819769 is about 526.3469798307.

The spelling of 145819769 in words is "one hundred forty-five million, eight hundred nineteen thousand, seven hundred sixty-nine".