153642449 has 4 divisors (see below), whose sum is σ = 153999360. Its totient is φ = 153285540.

The previous prime is 153642421. The next prime is 153642451. The reversal of 153642449 is 944246351.

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 a cyclic number.

It is not a de Polignac number, because 153642449 - 2⁸ = 153642193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153642409) 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, 177809 + ... + 178670.

It is an arithmetic number, because the mean of its divisors is an integer number (38499840).

Almost surely, 2^153642449 is an apocalyptic number.

It is an amenable number.

153642449 is a deficient number, since it is larger than the sum of its proper divisors (356911).

153642449 is an equidigital number, since it uses as much as digits as its factorization.

153642449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356910.

The product of its digits is 103680, while the sum is 38.

The square root of 153642449 is about 12395.2591340399. The cubic root of 153642449 is about 535.5956901733.

The spelling of 153642449 in words is "one hundred fifty-three million, six hundred forty-two thousand, four hundred forty-nine".