71962081 has 2 divisors, whose sum is σ = 71962082. Its totient is φ = 71962080.

The previous prime is 71962061. The next prime is 71962109. The reversal of 71962081 is 18026917.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61779600 + 10182481 = 7860^2 + 3191^2 .

It is a cyclic number.

It is not a de Polignac number, because 71962081 - 2¹⁷ = 71831009 is a prime.

It is a super-2 number, since 2×71962081² = 10357082203701122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71962031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35981040 + 35981041.

It is an arithmetic number, because the mean of its divisors is an integer number (35981041).

Almost surely, 2^71962081 is an apocalyptic number.

It is an amenable number.

71962081 is a deficient number, since it is larger than the sum of its proper divisors (1).

71962081 is an equidigital number, since it uses as much as digits as its factorization.

71962081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 71962081 is about 8483.0466814700. The cubic root of 71962081 is about 415.9437196575.

Adding to 71962081 its reverse (18026917), we get a palindrome (89988998).

The spelling of 71962081 in words is "seventy-one million, nine hundred sixty-two thousand, eighty-one".