71072387 has 8 divisors (see below), whose sum is σ = 71948352. Its totient is φ = 70200000.

The previous prime is 71072377. The next prime is 71072389. The reversal of 71072387 is 78327017.

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

It is a cyclic number.

It is not a de Polignac number, because 71072387 - 2⁴ = 71072371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71072389) 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, 75383 + ... + 76319.

It is an arithmetic number, because the mean of its divisors is an integer number (8993544).

Almost surely, 2^71072387 is an apocalyptic number.

71072387 is a deficient number, since it is larger than the sum of its proper divisors (875965).

71072387 is a wasteful number, since it uses less digits than its factorization.

71072387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 71072387 is about 8430.4440571064. Note that the first 3 decimals coincide. The cubic root of 71072387 is about 414.2224507951. Note that the first 3 decimals are identical.

The spelling of 71072387 in words is "seventy-one million, seventy-two thousand, three hundred eighty-seven".