149681597 has 8 divisors (see below), whose sum is σ = 161315616. Its totient is φ = 138064752.

The previous prime is 149681569. The next prime is 149681603. The reversal of 149681597 is 795186941.

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 149681597 - 2⁶ = 149681533 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 (149681507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18218 + ... + 25124.

It is an arithmetic number, because the mean of its divisors is an integer number (20164452).

Almost surely, 2^149681597 is an apocalyptic number.

It is an amenable number.

149681597 is a deficient number, since it is larger than the sum of its proper divisors (11634019).

149681597 is a wasteful number, since it uses less digits than its factorization.

149681597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8587.

The product of its digits is 544320, while the sum is 50.

The square root of 149681597 is about 12234.4430604748. The cubic root of 149681597 is about 530.9530697409.

The spelling of 149681597 in words is "one hundred forty-nine million, six hundred eighty-one thousand, five hundred ninety-seven".