71461993 has 2 divisors, whose sum is σ = 71461994. Its totient is φ = 71461992.

The previous prime is 71461987. The next prime is 71462009. The reversal of 71461993 is 39916417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58415449 + 13046544 = 7643^2 + 3612^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71461993 is a prime.

It is not a weakly prime, because it can be changed into another prime (71461903) 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, 35730996 + 35730997.

It is an arithmetic number, because the mean of its divisors is an integer number (35730997).

Almost surely, 2^71461993 is an apocalyptic number.

It is an amenable number.

71461993 is a deficient number, since it is larger than the sum of its proper divisors (1).

71461993 is an equidigital number, since it uses as much as digits as its factorization.

71461993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 40.

The square root of 71461993 is about 8453.5195628803. The cubic root of 71461993 is about 414.9779695084.

The spelling of 71461993 in words is "seventy-one million, four hundred sixty-one thousand, nine hundred ninety-three".