81937095 has 8 divisors (see below), whose sum is σ = 131099376. Its totient is φ = 43699776.

The previous prime is 81937081. The next prime is 81937111. The reversal of 81937095 is 59073918.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81937095 - 2¹⁴ = 81920711 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2731222 + ... + 2731251.

It is an arithmetic number, because the mean of its divisors is an integer number (16387422).

Almost surely, 2^81937095 is an apocalyptic number.

81937095 is a deficient number, since it is larger than the sum of its proper divisors (49162281).

81937095 is a wasteful number, since it uses less digits than its factorization.

81937095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5462481.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 81937095 is about 9051.9111241770. The cubic root of 81937095 is about 434.3370268204.

The spelling of 81937095 in words is "eighty-one million, nine hundred thirty-seven thousand, ninety-five".