141991087 has 4 divisors (see below), whose sum is σ = 162275536. Its totient is φ = 121706640.

The previous prime is 141991079. The next prime is 141991127. The reversal of 141991087 is 780199141.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780199141 = 439 ⋅1777219.

It is a cyclic number.

It is not a de Polignac number, because 141991087 - 2³ = 141991079 is a prime.

It is a super-2 number, since 2×141991087² = 40322937574883138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (141991027) 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, 10142214 + ... + 10142227.

It is an arithmetic number, because the mean of its divisors is an integer number (40568884).

Almost surely, 2^141991087 is an apocalyptic number.

141991087 is a deficient number, since it is larger than the sum of its proper divisors (20284449).

141991087 is an equidigital number, since it uses as much as digits as its factorization.

141991087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20284448.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 141991087 is about 11916.0013007720. The cubic root of 141991087 is about 521.6994288962.

The spelling of 141991087 in words is "one hundred forty-one million, nine hundred ninety-one thousand, eighty-seven".