149917247 has 4 divisors (see below), whose sum is σ = 150670800. Its totient is φ = 149163696.

The previous prime is 149917241. The next prime is 149917249. The reversal of 149917247 is 742719941.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 149917247 - 2²² = 145722943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 149917198 and 149917207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149917241) 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, 376478 + ... + 376875.

It is an arithmetic number, because the mean of its divisors is an integer number (37667700).

Almost surely, 2^149917247 is an apocalyptic number.

149917247 is a deficient number, since it is larger than the sum of its proper divisors (753553).

149917247 is an equidigital number, since it uses as much as digits as its factorization.

149917247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753552.

The product of its digits is 127008, while the sum is 44.

The square root of 149917247 is about 12244.0698707578. The cubic root of 149917247 is about 531.2315575236.

The spelling of 149917247 in words is "one hundred forty-nine million, nine hundred seventeen thousand, two hundred forty-seven".