71380397 has 16 divisors (see below), whose sum is σ = 84801600. Its totient is φ = 59351040.

The previous prime is 71380373. The next prime is 71380411. The reversal of 71380397 is 79308317.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71380397 is a prime.

It is a super-2 number, since 2×71380397² = 10190322151755218, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71380397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71380327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173 + ... + 11949.

It is an arithmetic number, because the mean of its divisors is an integer number (5300100).

Almost surely, 2^71380397 is an apocalyptic number.

It is an amenable number.

71380397 is a deficient number, since it is larger than the sum of its proper divisors (13421203).

71380397 is a wasteful number, since it uses less digits than its factorization.

71380397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11836.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 71380397 is about 8448.6920289474. The cubic root of 71380397 is about 414.8199673939.

The spelling of 71380397 in words is "seventy-one million, three hundred eighty thousand, three hundred ninety-seven".