70868981 has 4 divisors (see below), whose sum is σ = 71338464. Its totient is φ = 70399500.

The previous prime is 70868929. The next prime is 70868983. The reversal of 70868981 is 18986807.

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 70868981 - 2²⁶ = 3760117 is a prime.

It is a super-2 number, since 2×70868981² = 10044824935956722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70868983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234515 + ... + 234816.

It is an arithmetic number, because the mean of its divisors is an integer number (17834616).

Almost surely, 2^70868981 is an apocalyptic number.

It is an amenable number.

70868981 is a deficient number, since it is larger than the sum of its proper divisors (469483).

70868981 is a wasteful number, since it uses less digits than its factorization.

70868981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469482.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 70868981 is about 8418.3716358925. The cubic root of 70868981 is about 413.8269111593.

The spelling of 70868981 in words is "seventy million, eight hundred sixty-eight thousand, nine hundred eighty-one".