81434098 has 4 divisors (see below), whose sum is σ = 122151150. Its totient is φ = 40717048.

The previous prime is 81434047. The next prime is 81434107. The reversal of 81434098 is 89043418.

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., 79977249 + 1456849 = 8943^2 + 1207^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20358523 + ... + 20358526.

Almost surely, 2^81434098 is an apocalyptic number.

81434098 is a deficient number, since it is larger than the sum of its proper divisors (40717052).

81434098 is a wasteful number, since it uses less digits than its factorization.

81434098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40717051.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 81434098 is about 9024.0843302797. The cubic root of 81434098 is about 433.4464297833.

It can be divided in two parts, 814 and 34098, that multiplied together give a palindrome (27755772).

The spelling of 81434098 in words is "eighty-one million, four hundred thirty-four thousand, ninety-eight".