71420929 has 2 divisors, whose sum is σ = 71420930. Its totient is φ = 71420928.

The previous prime is 71420897. The next prime is 71420933. The reversal of 71420929 is 92902417.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40640625 + 30780304 = 6375^2 + 5548^2 .

It is an emirp because it is prime and its reverse (92902417) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71420929 - 2⁵ = 71420897 is a prime.

It is equal to p_4196680 and since 71420929 and 4196680 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 71420894 and 71420903.

It is not a weakly prime, because it can be changed into another prime (71420969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35710464 + 35710465.

It is an arithmetic number, because the mean of its divisors is an integer number (35710465).

Almost surely, 2^71420929 is an apocalyptic number.

It is an amenable number.

71420929 is a deficient number, since it is larger than the sum of its proper divisors (1).

71420929 is an equidigital number, since it uses as much as digits as its factorization.

71420929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 71420929 is about 8451.0904030190. The cubic root of 71420929 is about 414.8984684120.

The spelling of 71420929 in words is "seventy-one million, four hundred twenty thousand, nine hundred twenty-nine".