70980639 has 4 divisors (see below), whose sum is σ = 94640856. Its totient is φ = 47320424.

The previous prime is 70980629. The next prime is 70980641. The reversal of 70980639 is 93608907.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70980639 - 2⁸ = 70980383 is a prime.

It is a super-2 number, since 2×70980639² = 10076502225696642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 70980639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70980619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11830104 + ... + 11830109.

It is an arithmetic number, because the mean of its divisors is an integer number (23660214).

Almost surely, 2^70980639 is an apocalyptic number.

70980639 is a deficient number, since it is larger than the sum of its proper divisors (23660217).

70980639 is a wasteful number, since it uses less digits than its factorization.

70980639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23660216.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 70980639 is about 8425.0008308605. Note that the first 3 decimals coincide. The cubic root of 70980639 is about 414.0441328480.

The spelling of 70980639 in words is "seventy million, nine hundred eighty thousand, six hundred thirty-nine".