70878989 has 8 divisors (see below), whose sum is σ = 73500672. Its totient is φ = 68278320.

The previous prime is 70878979. The next prime is 70879009. The reversal of 70878989 is 98987807.

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 70878989 - 2¹⁶ = 70813453 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 (70878919) 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, 1787 + ... + 12039.

It is an arithmetic number, because the mean of its divisors is an integer number (9187584).

Almost surely, 2^70878989 is an apocalyptic number.

It is an amenable number.

70878989 is a deficient number, since it is larger than the sum of its proper divisors (2621683).

70878989 is a wasteful number, since it uses less digits than its factorization.

70878989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10507.

The product of its (nonzero) digits is 2032128, while the sum is 56.

The square root of 70878989 is about 8418.9660291511. The cubic root of 70878989 is about 413.8463902258.

It can be divided in two parts, 708 and 78989, that added together give a palindrome (79697).

The spelling of 70878989 in words is "seventy million, eight hundred seventy-eight thousand, nine hundred eighty-nine".