71428493 has 2 divisors, whose sum is σ = 71428494. Its totient is φ = 71428492.

The previous prime is 71428481. The next prime is 71428507. The reversal of 71428493 is 39482417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69172489 + 2256004 = 8317^2 + 1502^2 .

It is a cyclic number.

It is not a de Polignac number, because 71428493 - 2¹⁸ = 71166349 is a prime.

It is a super-3 number, since 3×71428493³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71428453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35714246 + 35714247.

It is an arithmetic number, because the mean of its divisors is an integer number (35714247).

Almost surely, 2^71428493 is an apocalyptic number.

It is an amenable number.

71428493 is a deficient number, since it is larger than the sum of its proper divisors (1).

71428493 is an equidigital number, since it uses as much as digits as its factorization.

71428493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 71428493 is about 8451.5379073870. The cubic root of 71428493 is about 414.9131148248.

The spelling of 71428493 in words is "seventy-one million, four hundred twenty-eight thousand, four hundred ninety-three".