81701674 has 4 divisors (see below), whose sum is σ = 122552514. Its totient is φ = 40850836.

The previous prime is 81701663. The next prime is 81701689. The reversal of 81701674 is 47610718.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 50509449 + 31192225 = 7107^2 + 5585^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20425417 + ... + 20425420.

Almost surely, 2^81701674 is an apocalyptic number.

81701674 is a deficient number, since it is larger than the sum of its proper divisors (40850840).

81701674 is a wasteful number, since it uses less digits than its factorization.

81701674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40850839.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 81701674 is about 9038.8978310411. The cubic root of 81701674 is about 433.9206499086.

The spelling of 81701674 in words is "eighty-one million, seven hundred one thousand, six hundred seventy-four".