71955445 has 4 divisors (see below), whose sum is σ = 86346540. Its totient is φ = 57564352.

The previous prime is 71955427. The next prime is 71955479. The reversal of 71955445 is 54455917.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54455917 = 179 ⋅304223.

It can be written as a sum of positive squares in 2 ways, for example, as 23639044 + 48316401 = 4862^2 + 6951^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71955445 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 71955398 and 71955407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7195540 + ... + 7195549.

It is an arithmetic number, because the mean of its divisors is an integer number (21586635).

Almost surely, 2^71955445 is an apocalyptic number.

It is an amenable number.

71955445 is a deficient number, since it is larger than the sum of its proper divisors (14391095).

71955445 is a wasteful number, since it uses less digits than its factorization.

71955445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14391094.

The product of its digits is 126000, while the sum is 40.

The square root of 71955445 is about 8482.6555393933. The cubic root of 71955445 is about 415.9309338156.

The spelling of 71955445 in words is "seventy-one million, nine hundred fifty-five thousand, four hundred forty-five".