70861917 has 8 divisors (see below), whose sum is σ = 107980096. Its totient is φ = 40492512.

The previous prime is 70861897. The next prime is 70861937. The reversal of 70861917 is 71916807.

It is an interprime number because it is at equal distance from previous prime (70861897) and next prime (70861937).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70861917 - 2⁷ = 70861789 is a prime.

It is a super-2 number, since 2×70861917² = 10042822561829778, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70861937) 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, 1687168 + ... + 1687209.

It is an arithmetic number, because the mean of its divisors is an integer number (13497512).

Almost surely, 2^70861917 is an apocalyptic number.

It is an amenable number.

70861917 is a deficient number, since it is larger than the sum of its proper divisors (37118179).

70861917 is a wasteful number, since it uses less digits than its factorization.

70861917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3374387.

The product of its (nonzero) digits is 21168, while the sum is 39.

The square root of 70861917 is about 8417.9520668628. The cubic root of 70861917 is about 413.8131610419.

The spelling of 70861917 in words is "seventy million, eight hundred sixty-one thousand, nine hundred seventeen".