71078397 has 16 divisors (see below), whose sum is σ = 102254208. Its totient is φ = 43657920.

The previous prime is 71078389. The next prime is 71078401. The reversal of 71078397 is 79387017.

It is a happy number.

It is not a de Polignac number, because 71078397 - 2³ = 71078389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71078317) 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, 24072 + ... + 26862.

It is an arithmetic number, because the mean of its divisors is an integer number (6390888).

Almost surely, 2^71078397 is an apocalyptic number.

It is an amenable number.

71078397 is a deficient number, since it is larger than the sum of its proper divisors (31175811).

71078397 is a wasteful number, since it uses less digits than its factorization.

71078397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3460.

The product of its (nonzero) digits is 74088, while the sum is 42.

The square root of 71078397 is about 8430.8004958011. The cubic root of 71078397 is about 414.2341262472.

The spelling of 71078397 in words is "seventy-one million, seventy-eight thousand, three hundred ninety-seven".