71917669 has 2 divisors, whose sum is σ = 71917670. Its totient is φ = 71917668.

The previous prime is 71917663. The next prime is 71917753. The reversal of 71917669 is 96671917.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38912644 + 33005025 = 6238^2 + 5745^2 .

It is a cyclic number.

It is not a de Polignac number, because 71917669 - 2¹⁹ = 71393381 is a prime.

It is a super-2 number, since 2×71917669² = 10344302228787122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71917663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35958834 + 35958835.

It is an arithmetic number, because the mean of its divisors is an integer number (35958835).

Almost surely, 2^71917669 is an apocalyptic number.

It is an amenable number.

71917669 is a deficient number, since it is larger than the sum of its proper divisors (1).

71917669 is an equidigital number, since it uses as much as digits as its factorization.

71917669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142884, while the sum is 46.

The square root of 71917669 is about 8480.4285858676. The cubic root of 71917669 is about 415.8581343337.

The spelling of 71917669 in words is "seventy-one million, nine hundred seventeen thousand, six hundred sixty-nine".