153909497 has 4 divisors (see below), whose sum is σ = 175896576. Its totient is φ = 131922420.

The previous prime is 153909493. The next prime is 153909521. The reversal of 153909497 is 794909351.

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 153909497 - 2² = 153909493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153909493) 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, 10993529 + ... + 10993542.

It is an arithmetic number, because the mean of its divisors is an integer number (43974144).

Almost surely, 2^153909497 is an apocalyptic number.

It is an amenable number.

153909497 is a deficient number, since it is larger than the sum of its proper divisors (21987079).

153909497 is an equidigital number, since it uses as much as digits as its factorization.

153909497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21987078.

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 153909497 is about 12406.0266403067. The cubic root of 153909497 is about 535.9058192455.

The spelling of 153909497 in words is "one hundred fifty-three million, nine hundred nine thousand, four hundred ninety-seven".