71061397 has 16 divisors (see below), whose sum is σ = 80556480. Its totient is φ = 62092800.

The previous prime is 71061391. The next prime is 71061407. The reversal of 71061397 is 79316017.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-71061397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71061391) 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, 105253 + ... + 105925.

It is an arithmetic number, because the mean of its divisors is an integer number (5034780).

Almost surely, 2^71061397 is an apocalyptic number.

It is an amenable number.

71061397 is a deficient number, since it is larger than the sum of its proper divisors (9495083).

71061397 is a wasteful number, since it uses less digits than its factorization.

71061397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 71061397 is about 8429.7922275700. The cubic root of 71061397 is about 414.2010991394.

The spelling of 71061397 in words is "seventy-one million, sixty-one thousand, three hundred ninety-seven".