70897 has 4 divisors (see below), whose sum is σ = 73216. Its totient is φ = 68580.

The previous prime is 70891. The next prime is 70901. The reversal of 70897 is 79807.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 70897 - 2⁷ = 70769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 2287 = 70897 / (7 + 0 + 8 + 9 + 7).

It is a Duffinian number.

It is a congruent number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1113 + ... + 1174.

It is an arithmetic number, because the mean of its divisors is an integer number (18304).

2⁷⁰⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

70897 is a deficient number, since it is larger than the sum of its proper divisors (2319).

70897 is a wasteful number, since it uses less digits than its factorization.

70897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 70897 is about 266.2649056860. The cubic root of 70897 is about 41.3881441309.

The spelling of 70897 in words is "seventy thousand, eight hundred ninety-seven".