70871543 has 2 divisors, whose sum is σ = 70871544. Its totient is φ = 70871542.

The previous prime is 70871509. The next prime is 70871551. The reversal of 70871543 is 34517807.

It is a strong prime.

It is an emirp because it is prime and its reverse (34517807) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70871543 - 2⁸ = 70871287 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70871503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35435771 + 35435772.

It is an arithmetic number, because the mean of its divisors is an integer number (35435772).

Almost surely, 2^70871543 is an apocalyptic number.

70871543 is a deficient number, since it is larger than the sum of its proper divisors (1).

70871543 is an equidigital number, since it uses as much as digits as its factorization.

70871543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 70871543 is about 8418.5238017125. The cubic root of 70871543 is about 413.8318978815.

The spelling of 70871543 in words is "seventy million, eight hundred seventy-one thousand, five hundred forty-three".