145347639 has 4 divisors (see below), whose sum is σ = 193796856. Its totient is φ = 96898424.

The previous prime is 145347619. The next prime is 145347647. The reversal of 145347639 is 936743541.

145347639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145347639 - 2⁵ = 145347607 is a prime.

It is a super-2 number, since 2×145347639² = 42251872325748642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145347639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145347619) 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, 24224604 + ... + 24224609.

It is an arithmetic number, because the mean of its divisors is an integer number (48449214).

Almost surely, 2^145347639 is an apocalyptic number.

145347639 is a deficient number, since it is larger than the sum of its proper divisors (48449217).

145347639 is an equidigital number, since it uses as much as digits as its factorization.

145347639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48449216.

The product of its digits is 272160, while the sum is 42.

The square root of 145347639 is about 12056.0208609640. The cubic root of 145347639 is about 525.7783032055.

The spelling of 145347639 in words is "one hundred forty-five million, three hundred forty-seven thousand, six hundred thirty-nine".