71492321 has 2 divisors, whose sum is σ = 71492322. Its totient is φ = 71492320.

The previous prime is 71492297. The next prime is 71492329. The reversal of 71492321 is 12329417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47128225 + 24364096 = 6865^2 + 4936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71492321 is a prime.

It is a super-2 number, since 2×71492321² = 10222303923934082, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (71492329) 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, 35746160 + 35746161.

It is an arithmetic number, because the mean of its divisors is an integer number (35746161).

Almost surely, 2^71492321 is an apocalyptic number.

It is an amenable number.

71492321 is a deficient number, since it is larger than the sum of its proper divisors (1).

71492321 is an equidigital number, since it uses as much as digits as its factorization.

71492321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 29.

The square root of 71492321 is about 8455.3131816628. The cubic root of 71492321 is about 415.0366658464.

The spelling of 71492321 in words is "seventy-one million, four hundred ninety-two thousand, three hundred twenty-one".