149856417 has 18 divisors (see below), whose sum is σ = 219189282. Its totient is φ = 98659776.

The previous prime is 149856407. The next prime is 149856433. The reversal of 149856417 is 714658941.

It can be written as a sum of positive squares in only one way, i.e., 148864401 + 992016 = 12201^2 + 996^2 .

It is not a de Polignac number, because 149856417 - 2¹⁰ = 149855393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149856407) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 60793 + ... + 63209.

Almost surely, 2^149856417 is an apocalyptic number.

It is an amenable number.

149856417 is a deficient number, since it is larger than the sum of its proper divisors (69332865).

149856417 is an equidigital number, since it uses as much as digits as its factorization.

149856417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2589 (or 2503 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 149856417 is about 12241.5855590687. The cubic root of 149856417 is about 531.1596974631.

The spelling of 149856417 in words is "one hundred forty-nine million, eight hundred fifty-six thousand, four hundred seventeen".