148157809 has 8 divisors (see below), whose sum is σ = 149931432. Its totient is φ = 146390400.

The previous prime is 148157797. The next prime is 148157813. The reversal of 148157809 is 908751841.

It is a happy number.

148157809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 225 + 148157584 = 15^2 + 12172^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 148157809 - 2⁹ = 148157297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148157869) 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, 60717 + ... + 63109.

It is an arithmetic number, because the mean of its divisors is an integer number (18741429).

Almost surely, 2^148157809 is an apocalyptic number.

It is an amenable number.

148157809 is a deficient number, since it is larger than the sum of its proper divisors (1773623).

148157809 is a wasteful number, since it uses less digits than its factorization.

148157809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 148157809 is about 12172.0092425203. The cubic root of 148157809 is about 529.1451854742.

The spelling of 148157809 in words is "one hundred forty-eight million, one hundred fifty-seven thousand, eight hundred nine".