71942397 has 8 divisors (see below), whose sum is σ = 98154144. Its totient is φ = 46846128.

The previous prime is 71942347. The next prime is 71942407. The reversal of 71942397 is 79324917.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71942397 - 2²⁶ = 4833533 is a prime.

It is a super-2 number, since 2×71942397² = 10351416972211218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71942347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278718 + ... + 278975.

It is an arithmetic number, because the mean of its divisors is an integer number (12269268).

Almost surely, 2^71942397 is an apocalyptic number.

It is an amenable number.

71942397 is a deficient number, since it is larger than the sum of its proper divisors (26211747).

71942397 is a wasteful number, since it uses less digits than its factorization.

71942397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557739.

The product of its digits is 95256, while the sum is 42.

The square root of 71942397 is about 8481.8864057472. The cubic root of 71942397 is about 415.9057914288.

It can be divided in two parts, 7194 and 2397, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 71942397 in words is "seventy-one million, nine hundred forty-two thousand, three hundred ninety-seven".