70981677 has 20 divisors (see below), whose sum is σ = 114192540. Its totient is φ = 43680384.

The previous prime is 70981667. The next prime is 70981679. The reversal of 70981677 is 77618907.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27342441 + 43639236 = 5229^2 + 6606^2 .

It is a de Polignac number, because none of the positive numbers 2^k-70981677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70981679) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 32652 + ... + 34757.

It is an arithmetic number, because the mean of its divisors is an integer number (5709627).

Almost surely, 2^70981677 is an apocalyptic number.

It is an amenable number.

70981677 is a deficient number, since it is larger than the sum of its proper divisors (43210863).

70981677 is a wasteful number, since it uses less digits than its factorization.

70981677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67434 (or 67425 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 45.

The square root of 70981677 is about 8425.0624330031. The cubic root of 70981677 is about 414.0461511248.

The spelling of 70981677 in words is "seventy million, nine hundred eighty-one thousand, six hundred seventy-seven".