71519491 has 2 divisors, whose sum is σ = 71519492. Its totient is φ = 71519490.

The previous prime is 71519473. The next prime is 71519509. The reversal of 71519491 is 19491517.

It is a balanced prime because it is at equal distance from previous prime (71519473) and next prime (71519509).

It is an emirp because it is prime and its reverse (19491517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71519491 - 2¹⁷ = 71388419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71519491.

It is not a weakly prime, because it can be changed into another prime (71519291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35759745 + 35759746.

It is an arithmetic number, because the mean of its divisors is an integer number (35759746).

Almost surely, 2^71519491 is an apocalyptic number.

71519491 is a deficient number, since it is larger than the sum of its proper divisors (1).

71519491 is an equidigital number, since it uses as much as digits as its factorization.

71519491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 37.

The square root of 71519491 is about 8456.9197111005. The cubic root of 71519491 is about 415.0892361450.

It can be divided in two parts, 71519 and 491, that added together give a triangular number (72010 = T₃₇₉).

The spelling of 71519491 in words is "seventy-one million, five hundred nineteen thousand, four hundred ninety-one".