71404391 has 2 divisors, whose sum is σ = 71404392. Its totient is φ = 71404390.

The previous prime is 71404373. The next prime is 71404429. The reversal of 71404391 is 19340417.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71404391 - 2¹⁴ = 71388007 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71403391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35702195 + 35702196.

It is an arithmetic number, because the mean of its divisors is an integer number (35702196).

Almost surely, 2^71404391 is an apocalyptic number.

71404391 is a deficient number, since it is larger than the sum of its proper divisors (1).

71404391 is an equidigital number, since it uses as much as digits as its factorization.

71404391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 71404391 is about 8450.1118927503. Note that the first 3 decimals coincide. The cubic root of 71404391 is about 414.8664417561.

The spelling of 71404391 in words is "seventy-one million, four hundred four thousand, three hundred ninety-one".