71156929 has 2 divisors, whose sum is σ = 71156930. Its totient is φ = 71156928.

The previous prime is 71156903. The next prime is 71156993. The reversal of 71156929 is 92965117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44355600 + 26801329 = 6660^2 + 5177^2 .

It is a cyclic number.

It is not a de Polignac number, because 71156929 - 2²⁵ = 37602497 is a prime.

It is a super-2 number, since 2×71156929² = 10126617089422082, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 71156891 and 71156900.

It is not a weakly prime, because it can be changed into another prime (71159929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35578464 + 35578465.

It is an arithmetic number, because the mean of its divisors is an integer number (35578465).

Almost surely, 2^71156929 is an apocalyptic number.

It is an amenable number.

71156929 is a deficient number, since it is larger than the sum of its proper divisors (1).

71156929 is an equidigital number, since it uses as much as digits as its factorization.

71156929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 40.

The square root of 71156929 is about 8435.4566562813. The cubic root of 71156929 is about 414.3866276282.

The spelling of 71156929 in words is "seventy-one million, one hundred fifty-six thousand, nine hundred twenty-nine".