149971499 has 8 divisors (see below), whose sum is σ = 155305920. Its totient is φ = 144648000.

The previous prime is 149971469. The next prime is 149971513. The reversal of 149971499 is 994179941.

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 149971499 - 2⁸ = 149971243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 149971499.

It is not an unprimeable number, because it can be changed into a prime (149971439) 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, 33599 + ... + 37799.

It is an arithmetic number, because the mean of its divisors is an integer number (19413240).

Almost surely, 2^149971499 is an apocalyptic number.

149971499 is a deficient number, since it is larger than the sum of its proper divisors (5334421).

149971499 is a wasteful number, since it uses less digits than its factorization.

149971499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5461.

The product of its digits is 734832, while the sum is 53.

The square root of 149971499 is about 12246.2851101875. The cubic root of 149971499 is about 531.2956304243.

The spelling of 149971499 in words is "one hundred forty-nine million, nine hundred seventy-one thousand, four hundred ninety-nine".