71997403 has 4 divisors (see below), whose sum is σ = 75786760. Its totient is φ = 68208048.

The previous prime is 71997391. The next prime is 71997421. The reversal of 71997403 is 30479917.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71997403 - 2¹⁷ = 71866331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71997503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1894650 + ... + 1894687.

It is an arithmetic number, because the mean of its divisors is an integer number (18946690).

Almost surely, 2^71997403 is an apocalyptic number.

71997403 is a deficient number, since it is larger than the sum of its proper divisors (3789357).

71997403 is a wasteful number, since it uses less digits than its factorization.

71997403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3789356.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 71997403 is about 8485.1283431661. The cubic root of 71997403 is about 416.0117627190.

The spelling of 71997403 in words is "seventy-one million, nine hundred ninety-seven thousand, four hundred three".