149861599 has 8 divisors (see below), whose sum is σ = 151249280. Its totient is φ = 148478616.

The previous prime is 149861597. The next prime is 149861603. The reversal of 149861599 is 995168941.

It is a happy number.

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 149861599 - 2¹ = 149861597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149861597) 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, 100312 + ... + 101794.

It is an arithmetic number, because the mean of its divisors is an integer number (18906160).

Almost surely, 2^149861599 is an apocalyptic number.

149861599 is a deficient number, since it is larger than the sum of its proper divisors (1387681).

149861599 is a wasteful number, since it uses less digits than its factorization.

149861599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349.

The product of its digits is 699840, while the sum is 52.

The square root of 149861599 is about 12241.7972128279. The cubic root of 149861599 is about 531.1658198521.

The spelling of 149861599 in words is "one hundred forty-nine million, eight hundred sixty-one thousand, five hundred ninety-nine".