141991069 has 4 divisors (see below), whose sum is σ = 154899360. Its totient is φ = 129082780.

The previous prime is 141991063. The next prime is 141991079. The reversal of 141991069 is 960199141.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 141991069 - 2¹⁷ = 141859997 is a prime.

It is a super-3 number, since 3×141991069³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (141991063) 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, 6454129 + ... + 6454150.

It is an arithmetic number, because the mean of its divisors is an integer number (38724840).

Almost surely, 2^141991069 is an apocalyptic number.

It is an amenable number.

141991069 is a deficient number, since it is larger than the sum of its proper divisors (12908291).

141991069 is a wasteful number, since it uses less digits than its factorization.

141991069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12908290.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 141991069 is about 11916.0005454850. Note that the first 3 decimals coincide. The cubic root of 141991069 is about 521.6994068512.

The spelling of 141991069 in words is "one hundred forty-one million, nine hundred ninety-one thousand, sixty-nine".