70642847 has 4 divisors (see below), whose sum is σ = 77064936. Its totient is φ = 64220760.

The previous prime is 70642813. The next prime is 70642853. The reversal of 70642847 is 74824607.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70642847 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 70642847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70642147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3211028 + ... + 3211049.

It is an arithmetic number, because the mean of its divisors is an integer number (19266234).

Almost surely, 2^70642847 is an apocalyptic number.

70642847 is a deficient number, since it is larger than the sum of its proper divisors (6422089).

70642847 is a wasteful number, since it uses less digits than its factorization.

70642847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6422088.

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 70642847 is about 8404.9299223729. The cubic root of 70642847 is about 413.3862856342.

The spelling of 70642847 in words is "seventy million, six hundred forty-two thousand, eight hundred forty-seven".