71098645 has 8 divisors (see below), whose sum is σ = 87624504. Its totient is φ = 55341504.

The previous prime is 71098613. The next prime is 71098661. The reversal of 71098645 is 54689017.

It can be written as a sum of positive squares in 4 ways, for example, as 42732369 + 28366276 = 6537^2 + 5326^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 71098645 - 2⁵ = 71098613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71098598 and 71098607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191974 + ... + 192343.

It is an arithmetic number, because the mean of its divisors is an integer number (10953063).

Almost surely, 2^71098645 is an apocalyptic number.

It is an amenable number.

71098645 is a deficient number, since it is larger than the sum of its proper divisors (16525859).

71098645 is a wasteful number, since it uses less digits than its factorization.

71098645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384359.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 71098645 is about 8432.0012452561. The cubic root of 71098645 is about 414.2734566047.

The spelling of 71098645 in words is "seventy-one million, ninety-eight thousand, six hundred forty-five".