70487871 has 4 divisors (see below), whose sum is σ = 93983832. Its totient is φ = 46991912.

The previous prime is 70487869. The next prime is 70487881. The reversal of 70487871 is 17878407.

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 70487871 - 2¹ = 70487869 is a prime.

It is a super-2 number, since 2×70487871² = 9937079916225282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70487881) 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, 11747976 + ... + 11747981.

It is an arithmetic number, because the mean of its divisors is an integer number (23495958).

Almost surely, 2^70487871 is an apocalyptic number.

70487871 is a deficient number, since it is larger than the sum of its proper divisors (23495961).

70487871 is a wasteful number, since it uses less digits than its factorization.

70487871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23495960.

The product of its (nonzero) digits is 87808, while the sum is 42.

The square root of 70487871 is about 8395.7055093661. The cubic root of 70487871 is about 413.0837692371.

The spelling of 70487871 in words is "seventy million, four hundred eighty-seven thousand, eight hundred seventy-one".