71156497 has 2 divisors, whose sum is σ = 71156498. Its totient is φ = 71156496.

The previous prime is 71156473. The next prime is 71156507. The reversal of 71156497 is 79465117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70963776 + 192721 = 8424^2 + 439^2 .

It is a cyclic number.

It is not a de Polignac number, because 71156497 - 2¹⁵ = 71123729 is a prime.

It is a super-2 number, since 2×71156497² = 10126494130622018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71156297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35578248 + 35578249.

It is an arithmetic number, because the mean of its divisors is an integer number (35578249).

Almost surely, 2^71156497 is an apocalyptic number.

It is an amenable number.

71156497 is a deficient number, since it is larger than the sum of its proper divisors (1).

71156497 is an equidigital number, since it uses as much as digits as its factorization.

71156497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 40.

The square root of 71156497 is about 8435.4310500412. The cubic root of 71156497 is about 414.3857890339.

The spelling of 71156497 in words is "seventy-one million, one hundred fifty-six thousand, four hundred ninety-seven".