81796951 has 8 divisors (see below), whose sum is σ = 83341440. Its totient is φ = 80257848.

The previous prime is 81796933. The next prime is 81796969. The reversal of 81796951 is 15969718.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (81796933) and next prime (81796969).

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

It is a cyclic number.

It is not a de Polignac number, because 81796951 - 2⁹ = 81796439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81796051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41940 + ... + 43846.

It is an arithmetic number, because the mean of its divisors is an integer number (10417680).

Almost surely, 2^81796951 is an apocalyptic number.

81796951 is a deficient number, since it is larger than the sum of its proper divisors (1544489).

81796951 is a wasteful number, since it uses less digits than its factorization.

81796951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2693.

The product of its digits is 136080, while the sum is 46.

The square root of 81796951 is about 9044.1666835591. The cubic root of 81796951 is about 434.0892576227.

The spelling of 81796951 in words is "eighty-one million, seven hundred ninety-six thousand, nine hundred fifty-one".