71493905 has 32 divisors (see below), whose sum is σ = 102187008. Its totient is φ = 46987200.

The previous prime is 71493887. The next prime is 71493911. The reversal of 71493905 is 50939417.

It is a happy number.

It is not a de Polignac number, because 71493905 - 2¹⁰ = 71492881 is a prime.

It is a super-2 number, since 2×71493905² = 10222756904298050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141884 + ... + 142386.

It is an arithmetic number, because the mean of its divisors is an integer number (3193344).

Almost surely, 2^71493905 is an apocalyptic number.

It is an amenable number.

71493905 is a deficient number, since it is larger than the sum of its proper divisors (30693103).

71493905 is a wasteful number, since it uses less digits than its factorization.

71493905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 71493905 is about 8455.4068500575. The cubic root of 71493905 is about 415.0397310391.

The spelling of 71493905 in words is "seventy-one million, four hundred ninety-three thousand, nine hundred five".