145047809 has 8 divisors (see below), whose sum is σ = 146655360. Its totient is φ = 143445136.

The previous prime is 145047797. The next prime is 145047827. The reversal of 145047809 is 908740541.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145047809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145047899) 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, 117407 + ... + 118635.

It is an arithmetic number, because the mean of its divisors is an integer number (18331920).

Almost surely, 2^145047809 is an apocalyptic number.

It is an amenable number.

145047809 is a deficient number, since it is larger than the sum of its proper divisors (1607551).

145047809 is a wasteful number, since it uses less digits than its factorization.

145047809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 145047809 is about 12043.5795758570. The cubic root of 145047809 is about 525.4165208545.

The spelling of 145047809 in words is "one hundred forty-five million, forty-seven thousand, eight hundred nine".