153085409 has 4 divisors (see below), whose sum is σ = 158023680. Its totient is φ = 148147140.

The previous prime is 153085399. The next prime is 153085411. The reversal of 153085409 is 904580351.

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, and also an emirpimes, since its reverse is a distinct semiprime: 904580351 = 283 ⋅3196397.

It is a de Polignac number, because none of the positive numbers 2^k-153085409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153082409) 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, 2469089 + ... + 2469150.

It is an arithmetic number, because the mean of its divisors is an integer number (39505920).

Almost surely, 2^153085409 is an apocalyptic number.

It is an amenable number.

153085409 is a deficient number, since it is larger than the sum of its proper divisors (4938271).

153085409 is an equidigital number, since it uses as much as digits as its factorization.

153085409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4938270.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 153085409 is about 12372.7688493724. The cubic root of 153085409 is about 534.9476281456.

The spelling of 153085409 in words is "one hundred fifty-three million, eighty-five thousand, four hundred nine".