71955493 has 2 divisors, whose sum is σ = 71955494. Its totient is φ = 71955492.

The previous prime is 71955487. The next prime is 71955517. The reversal of 71955493 is 39455917.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70593604 + 1361889 = 8402^2 + 1167^2 .

It is an emirp because it is prime and its reverse (39455917) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71955493 - 2¹³ = 71947301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71950493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35977746 + 35977747.

It is an arithmetic number, because the mean of its divisors is an integer number (35977747).

Almost surely, 2^71955493 is an apocalyptic number.

It is an amenable number.

71955493 is a deficient number, since it is larger than the sum of its proper divisors (1).

71955493 is an equidigital number, since it uses as much as digits as its factorization.

71955493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 170100, while the sum is 43.

The square root of 71955493 is about 8482.6583686955. The cubic root of 71955493 is about 415.9310263019.

The spelling of 71955493 in words is "seventy-one million, nine hundred fifty-five thousand, four hundred ninety-three".