70871491 has 2 divisors, whose sum is σ = 70871492. Its totient is φ = 70871490.

The previous prime is 70871483. The next prime is 70871497. The reversal of 70871491 is 19417807.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70871491 - 2³ = 70871483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70871491.

It is not a weakly prime, because it can be changed into another prime (70871497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35435745 + 35435746.

It is an arithmetic number, because the mean of its divisors is an integer number (35435746).

Almost surely, 2^70871491 is an apocalyptic number.

70871491 is a deficient number, since it is larger than the sum of its proper divisors (1).

70871491 is an equidigital number, since it uses as much as digits as its factorization.

70871491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 70871491 is about 8418.5207132845. The cubic root of 70871491 is about 413.8317966690.

The spelling of 70871491 in words is "seventy million, eight hundred seventy-one thousand, four hundred ninety-one".