70830861 has 4 divisors (see below), whose sum is σ = 94441152. Its totient is φ = 47220572.

The previous prime is 70830853. The next prime is 70830863. The reversal of 70830861 is 16803807.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16803807 = 3 ⋅5601269.

It is a cyclic number.

It is not a de Polignac number, because 70830861 - 2³ = 70830853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70830863) 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, 11805141 + ... + 11805146.

It is an arithmetic number, because the mean of its divisors is an integer number (23610288).

Almost surely, 2^70830861 is an apocalyptic number.

It is an amenable number.

70830861 is a deficient number, since it is larger than the sum of its proper divisors (23610291).

70830861 is a wasteful number, since it uses less digits than its factorization.

70830861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23610290.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 70830861 is about 8416.1072355335. The cubic root of 70830861 is about 413.7526995135.

The spelling of 70830861 in words is "seventy million, eight hundred thirty thousand, eight hundred sixty-one".