70981897 has 8 divisors (see below), whose sum is σ = 82497600. Its totient is φ = 59810064.

The previous prime is 70981871. The next prime is 70981901. The reversal of 70981897 is 79818907.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70981897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70981897.

It is not an unprimeable number, because it can be changed into a prime (70981297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85522 + ... + 86347.

It is an arithmetic number, because the mean of its divisors is an integer number (10312200).

Almost surely, 2^70981897 is an apocalyptic number.

It is an amenable number.

70981897 is a deficient number, since it is larger than the sum of its proper divisors (11515703).

70981897 is a wasteful number, since it uses less digits than its factorization.

70981897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171935.

The product of its (nonzero) digits is 254016, while the sum is 49.

The square root of 70981897 is about 8425.0754892760. The cubic root of 70981897 is about 414.0465788880.

The spelling of 70981897 in words is "seventy million, nine hundred eighty-one thousand, eight hundred ninety-seven".