81437098 has 8 divisors (see below), whose sum is σ = 124996608. Its totient is φ = 39771564.

The previous prime is 81437077. The next prime is 81437101. The reversal of 81437098 is 89073418.

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

It is a self number, because there is not a number n which added to its sum of digits gives 81437098.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473386 + ... + 473557.

It is an arithmetic number, because the mean of its divisors is an integer number (15624576).

Almost surely, 2^81437098 is an apocalyptic number.

81437098 is a deficient number, since it is larger than the sum of its proper divisors (43559510).

81437098 is a wasteful number, since it uses less digits than its factorization.

81437098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946988.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 81437098 is about 9024.2505505998. The cubic root of 81437098 is about 433.4517523830.

The spelling of 81437098 in words is "eighty-one million, four hundred thirty-seven thousand, ninety-eight".