70478687 has 4 divisors (see below), whose sum is σ = 70519416. Its totient is φ = 70437960.

The previous prime is 70478663. The next prime is 70478689. The reversal of 70478687 is 78687407.

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 70478687 - 2¹⁴ = 70462303 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 (70478689) 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, 17648 + ... + 21269.

It is an arithmetic number, because the mean of its divisors is an integer number (17629854).

Almost surely, 2^70478687 is an apocalyptic number.

70478687 is a deficient number, since it is larger than the sum of its proper divisors (40729).

70478687 is a wasteful number, since it uses less digits than its factorization.

70478687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40728.

The product of its (nonzero) digits is 526848, while the sum is 47.

The square root of 70478687 is about 8395.1585452569. The cubic root of 70478687 is about 413.0658279655.

The spelling of 70478687 in words is "seventy million, four hundred seventy-eight thousand, six hundred eighty-seven".