71400397 has 2 divisors, whose sum is σ = 71400398. Its totient is φ = 71400396.

The previous prime is 71400389. The next prime is 71400403. The reversal of 71400397 is 79300417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41139396 + 30261001 = 6414^2 + 5501^2 .

It is a cyclic number.

It is not a de Polignac number, because 71400397 - 2³ = 71400389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71400367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35700198 + 35700199.

It is an arithmetic number, because the mean of its divisors is an integer number (35700199).

Almost surely, 2^71400397 is an apocalyptic number.

It is an amenable number.

71400397 is a deficient number, since it is larger than the sum of its proper divisors (1).

71400397 is an equidigital number, since it uses as much as digits as its factorization.

71400397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 71400397 is about 8449.8755612139. The cubic root of 71400397 is about 414.8587064360.

The spelling of 71400397 in words is "seventy-one million, four hundred thousand, three hundred ninety-seven".