148973857 has 4 divisors (see below), whose sum is σ = 149319936. Its totient is φ = 148627780.

The previous prime is 148973827. The next prime is 148973863. The reversal of 148973857 is 758379841.

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 a de Polignac number, because none of the positive numbers 2^k-148973857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148973827) 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, 172393 + ... + 173254.

It is an arithmetic number, because the mean of its divisors is an integer number (37329984).

Almost surely, 2^148973857 is an apocalyptic number.

It is an amenable number.

148973857 is a deficient number, since it is larger than the sum of its proper divisors (346079).

148973857 is an equidigital number, since it uses as much as digits as its factorization.

148973857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346078.

The product of its digits is 1693440, while the sum is 52.

The square root of 148973857 is about 12205.4847097524. The cubic root of 148973857 is about 530.1149115973.

The spelling of 148973857 in words is "one hundred forty-eight million, nine hundred seventy-three thousand, eight hundred fifty-seven".