71954089 has 4 divisors (see below), whose sum is σ = 72234324. Its totient is φ = 71673856.

The previous prime is 71954087. The next prime is 71954101. The reversal of 71954089 is 98045917.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60964864 + 10989225 = 7808^2 + 3315^2 .

It is a cyclic number.

It is not a de Polignac number, because 71954089 - 2¹ = 71954087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71954087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139732 + ... + 140245.

It is an arithmetic number, because the mean of its divisors is an integer number (18058581).

Almost surely, 2^71954089 is an apocalyptic number.

It is an amenable number.

71954089 is a deficient number, since it is larger than the sum of its proper divisors (280235).

71954089 is a wasteful number, since it uses less digits than its factorization.

71954089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280234.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 71954089 is about 8482.5756112162. The cubic root of 71954089 is about 415.9283210604.

The spelling of 71954089 in words is "seventy-one million, nine hundred fifty-four thousand, eighty-nine".