70898 has 4 divisors (see below), whose sum is σ = 106350. Its totient is φ = 35448.

The previous prime is 70891. The next prime is 70901. The reversal of 70898 is 89807.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89807 = 31 ⋅2897.

It can be written as a sum of positive squares in only one way, i.e., 64009 + 6889 = 253^2 + 83^2 .

It is not an unprimeable number, because it can be changed into a prime (70891) by changing a digit.

70898 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17723 + ... + 17726.

2⁷⁰⁸⁹⁸ is an apocalyptic number.

70898 is a deficient number, since it is larger than the sum of its proper divisors (35452).

70898 is a wasteful number, since it uses less digits than its factorization.

70898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35451.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 70898 is about 266.2667835086. The cubic root of 70898 is about 41.3883387228.

Subtracting from 70898 its product of nonzero digits (4032), we obtain a palindrome (66866).

The spelling of 70898 in words is "seventy thousand, eight hundred ninety-eight".