71207289 has 16 divisors (see below), whose sum is σ = 106430400. Its totient is φ = 47049408.

The previous prime is 71207263. The next prime is 71207317. The reversal of 71207289 is 98270217.

It is not a de Polignac number, because 71207289 - 2⁷ = 71207161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71207219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8619 + ... + 14720.

It is an arithmetic number, because the mean of its divisors is an integer number (6651900).

Almost surely, 2^71207289 is an apocalyptic number.

It is an amenable number.

71207289 is a deficient number, since it is larger than the sum of its proper divisors (35223111).

71207289 is a wasteful number, since it uses less digits than its factorization.

71207289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23461 (or 23455 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 71207289 is about 8438.4411475106. The cubic root of 71207289 is about 414.4843627314.

The spelling of 71207289 in words is "seventy-one million, two hundred seven thousand, two hundred eighty-nine".