70971797 has 8 divisors (see below), whose sum is σ = 77109144. Its totient is φ = 64931328.

The previous prime is 70971781. The next prime is 70971799. The reversal of 70971797 is 79717907.

It can be written as a sum of positive squares in 4 ways, for example, as 4157521 + 66814276 = 2039^2 + 8174^2 .

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 70971797 - 2⁴ = 70971781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70971799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22688 + ... + 25625.

It is an arithmetic number, because the mean of its divisors is an integer number (9638643).

Almost surely, 2^70971797 is an apocalyptic number.

It is an amenable number.

70971797 is a deficient number, since it is larger than the sum of its proper divisors (6137347).

70971797 is a wasteful number, since it uses less digits than its factorization.

70971797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48439.

The product of its (nonzero) digits is 194481, while the sum is 47.

The square root of 70971797 is about 8424.4760667949. The cubic root of 70971797 is about 414.0269397547.

The spelling of 70971797 in words is "seventy million, nine hundred seventy-one thousand, seven hundred ninety-seven".