145313769 has 4 divisors (see below), whose sum is σ = 193751696. Its totient is φ = 96875844.

The previous prime is 145313759. The next prime is 145313789. The reversal of 145313769 is 967313541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 145313769 - 2⁵ = 145313737 is a prime.

It is a super-2 number, since 2×145313769² = 42232182921970722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145313759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24218959 + ... + 24218964.

It is an arithmetic number, because the mean of its divisors is an integer number (48437924).

Almost surely, 2^145313769 is an apocalyptic number.

It is an amenable number.

145313769 is a deficient number, since it is larger than the sum of its proper divisors (48437927).

145313769 is an equidigital number, since it uses as much as digits as its factorization.

145313769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48437926.

The product of its digits is 68040, while the sum is 39.

The square root of 145313769 is about 12054.6160867943. The cubic root of 145313769 is about 525.7374597612.

The spelling of 145313769 in words is "one hundred forty-five million, three hundred thirteen thousand, seven hundred sixty-nine".