81670962 has 8 divisors (see below), whose sum is σ = 163341936. Its totient is φ = 27223652.

The previous prime is 81670943. The next prime is 81670973. The reversal of 81670962 is 26907618.

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

81670962 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 81670962.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6805908 + ... + 6805919.

It is an arithmetic number, because the mean of its divisors is an integer number (20417742).

Almost surely, 2^81670962 is an apocalyptic number.

81670962 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81670962 is a wasteful number, since it uses less digits than its factorization.

81670962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13611832.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 81670962 is about 9037.1987916611. The cubic root of 81670962 is about 433.8662722337.

The spelling of 81670962 in words is "eighty-one million, six hundred seventy thousand, nine hundred sixty-two".