81262097 has 4 divisors (see below), whose sum is σ = 92870976. Its totient is φ = 69653220.

The previous prime is 81262087. The next prime is 81262121. The reversal of 81262097 is 79026218.

It is a happy number.

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 de Polignac number, because none of the positive numbers 2^k-81262097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81262037) 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, 5804429 + ... + 5804442.

It is an arithmetic number, because the mean of its divisors is an integer number (23217744).

Almost surely, 2^81262097 is an apocalyptic number.

It is an amenable number.

81262097 is a deficient number, since it is larger than the sum of its proper divisors (11608879).

81262097 is a wasteful number, since it uses less digits than its factorization.

81262097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11608878.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 81262097 is about 9014.5491845128. The cubic root of 81262097 is about 433.1410467719.

The spelling of 81262097 in words is "eighty-one million, two hundred sixty-two thousand, ninety-seven".