71431907 has 4 divisors (see below), whose sum is σ = 71450016. Its totient is φ = 71413800.

The previous prime is 71431903. The next prime is 71431939. The reversal of 71431907 is 70913417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70913417 = 53 ⋅1337989.

It is a cyclic number.

It is not a de Polignac number, because 71431907 - 2² = 71431903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71431903) 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, 344 + ... + 11957.

It is an arithmetic number, because the mean of its divisors is an integer number (17862504).

Almost surely, 2^71431907 is an apocalyptic number.

71431907 is a deficient number, since it is larger than the sum of its proper divisors (18109).

71431907 is a wasteful number, since it uses less digits than its factorization.

71431907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18108.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 71431907 is about 8451.7398800484. The cubic root of 71431907 is about 414.9197251225.

The spelling of 71431907 in words is "seventy-one million, four hundred thirty-one thousand, nine hundred seven".