71940797 has 4 divisors (see below), whose sum is σ = 72851520. Its totient is φ = 71030076.

The previous prime is 71940731. The next prime is 71940809. The reversal of 71940797 is 79704917.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79704917 = 79 ⋅1008923.

It is a cyclic number.

It is not a de Polignac number, because 71940797 - 2⁸ = 71940541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71940727) 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, 455243 + ... + 455400.

It is an arithmetic number, because the mean of its divisors is an integer number (18212880).

Almost surely, 2^71940797 is an apocalyptic number.

It is an amenable number.

71940797 is a deficient number, since it is larger than the sum of its proper divisors (910723).

71940797 is an equidigital number, since it uses as much as digits as its factorization.

71940797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910722.

The product of its (nonzero) digits is 111132, while the sum is 44.

The square root of 71940797 is about 8481.7920865817. The cubic root of 71940797 is about 415.9027081556.

The spelling of 71940797 in words is "seventy-one million, nine hundred forty thousand, seven hundred ninety-seven".