80141991 has 4 divisors (see below), whose sum is σ = 106855992. Its totient is φ = 53427992.

The previous prime is 80141987. The next prime is 80142011. The reversal of 80141991 is 19914108.

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

It is a cyclic number.

It is not a de Polignac number, because 80141991 - 2² = 80141987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80141911) 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, 13356996 + ... + 13357001.

It is an arithmetic number, because the mean of its divisors is an integer number (26713998).

Almost surely, 2^80141991 is an apocalyptic number.

80141991 is a deficient number, since it is larger than the sum of its proper divisors (26714001).

80141991 is a wasteful number, since it uses less digits than its factorization.

80141991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26714000.

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 80141991 is about 8952.2059292668. The cubic root of 80141991 is about 431.1417126137.

The spelling of 80141991 in words is "eighty million, one hundred forty-one thousand, nine hundred ninety-one".