149982691 has 4 divisors (see below), whose sum is σ = 150040000. Its totient is φ = 149925384.

The previous prime is 149982683. The next prime is 149982727. The reversal of 149982691 is 196289941.

It is a happy number.

149982691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196289941 = 5821 ⋅33721.

It is a cyclic number.

It is not a de Polignac number, because 149982691 - 2³ = 149982683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149982611) 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, 24531 + ... + 30028.

It is an arithmetic number, because the mean of its divisors is an integer number (37510000).

Almost surely, 2^149982691 is an apocalyptic number.

149982691 is a deficient number, since it is larger than the sum of its proper divisors (57309).

149982691 is an equidigital number, since it uses as much as digits as its factorization.

149982691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57308.

The product of its digits is 279936, while the sum is 49.

The square root of 149982691 is about 12246.7420565635. The cubic root of 149982691 is about 531.3088465194.

It can be divided in two parts, 14998 and 2691, that added together give a square (17689 = 133²).

The spelling of 149982691 in words is "one hundred forty-nine million, nine hundred eighty-two thousand, six hundred ninety-one".