71477381 has 2 divisors, whose sum is σ = 71477382. Its totient is φ = 71477380.

The previous prime is 71477369. The next prime is 71477387. The reversal of 71477381 is 18377417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68326756 + 3150625 = 8266^2 + 1775^2 .

It is a cyclic number.

It is not a de Polignac number, because 71477381 - 2²² = 67283077 is a prime.

It is a super-2 number, since 2×71477381² = 10218031989238322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71477387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35738690 + 35738691.

It is an arithmetic number, because the mean of its divisors is an integer number (35738691).

Almost surely, 2^71477381 is an apocalyptic number.

It is an amenable number.

71477381 is a deficient number, since it is larger than the sum of its proper divisors (1).

71477381 is an equidigital number, since it uses as much as digits as its factorization.

71477381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32928, while the sum is 38.

The square root of 71477381 is about 8454.4296673401. The cubic root of 71477381 is about 415.0077532785.

The spelling of 71477381 in words is "seventy-one million, four hundred seventy-seven thousand, three hundred eighty-one".