81948676 has 12 divisors (see below), whose sum is σ = 144006940. Its totient is φ = 40803840.

The previous prime is 81948641. The next prime is 81948677. The reversal of 81948676 is 67684918.

It can be written as a sum of positive squares in 2 ways, for example, as 53582400 + 28366276 = 7320^2 + 5326^2 .

It is not an unprimeable number, because it can be changed into a prime (81948677) 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, 41541 + ... + 43468.

Almost surely, 2^81948676 is an apocalyptic number.

It is an amenable number.

81948676 is a deficient number, since it is larger than the sum of its proper divisors (62058264).

81948676 is a wasteful number, since it uses less digits than its factorization.

81948676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85254 (or 85252 counting only the distinct ones).

The product of its digits is 580608, while the sum is 49.

The square root of 81948676 is about 9052.5508007412. The cubic root of 81948676 is about 434.3574889409.

It can be divided in two parts, 81 and 948676, that multiplied together give a square (76842756 = 8766²).

The spelling of 81948676 in words is "eighty-one million, nine hundred forty-eight thousand, six hundred seventy-six".