149797857 has 8 divisors (see below), whose sum is σ = 217887840. Its totient is φ = 90786560.

The previous prime is 149797849. The next prime is 149797861. The reversal of 149797857 is 758797941.

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 149797857 - 2³ = 149797849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 149797797 and 149797806.

It is not an unprimeable number, because it can be changed into a prime (149797807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2269632 + ... + 2269697.

It is an arithmetic number, because the mean of its divisors is an integer number (27235980).

Almost surely, 2^149797857 is an apocalyptic number.

It is an amenable number.

149797857 is a deficient number, since it is larger than the sum of its proper divisors (68089983).

149797857 is a wasteful number, since it uses less digits than its factorization.

149797857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539343.

The product of its digits is 4445280, while the sum is 57.

The square root of 149797857 is about 12239.1934783302. The cubic root of 149797857 is about 531.0905006390.

The spelling of 149797857 in words is "one hundred forty-nine million, seven hundred ninety-seven thousand, eight hundred fifty-seven".