71551889 has 2 divisors, whose sum is σ = 71551890. Its totient is φ = 71551888.

The previous prime is 71551877. The next prime is 71551901. The reversal of 71551889 is 98815517.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (71551877) and next prime (71551901).

It can be written as a sum of positive squares in only one way, i.e., 50694400 + 20857489 = 7120^2 + 4567^2 .

It is a cyclic number.

It is not a de Polignac number, because 71551889 - 2¹² = 71547793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71551829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35775944 + 35775945.

It is an arithmetic number, because the mean of its divisors is an integer number (35775945).

Almost surely, 2^71551889 is an apocalyptic number.

It is an amenable number.

71551889 is a deficient number, since it is larger than the sum of its proper divisors (1).

71551889 is an equidigital number, since it uses as much as digits as its factorization.

71551889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 44.

The square root of 71551889 is about 8458.8349670625. The cubic root of 71551889 is about 415.1519045205.

The spelling of 71551889 in words is "seventy-one million, five hundred fifty-one thousand, eight hundred eighty-nine".