150691 has 4 divisors (see below), whose sum is σ = 155584. Its totient is φ = 145800.

The previous prime is 150659. The next prime is 150697. The reversal of 150691 is 196051.

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

It is a 6-Lehmer number, since φ(150691) divides (150691-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 150691 - 2⁵ = 150659 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (150697) 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, 2400 + ... + 2461.

It is an arithmetic number, because the mean of its divisors is an integer number (38896).

2¹⁵⁰⁶⁹¹ is an apocalyptic number.

150691 is a deficient number, since it is larger than the sum of its proper divisors (4893).

150691 is an equidigital number, since it uses as much as digits as its factorization.

150691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4892.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 150691 is about 388.1893867689. The cubic root of 150691 is about 53.2143920585.

It can be divided in two parts, 150 and 691, that added together give a square (841 = 29²).

The spelling of 150691 in words is "one hundred fifty thousand, six hundred ninety-one".