71953697 has 4 divisors (see below), whose sum is σ = 74274816. Its totient is φ = 69632580.

The previous prime is 71953667. The next prime is 71953733. The reversal of 71953697 is 79635917.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71953697 - 2¹² = 71949601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71953667) 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, 1160513 + ... + 1160574.

It is an arithmetic number, because the mean of its divisors is an integer number (18568704).

Almost surely, 2^71953697 is an apocalyptic number.

It is an amenable number.

71953697 is a deficient number, since it is larger than the sum of its proper divisors (2321119).

71953697 is a wasteful number, since it uses less digits than its factorization.

71953697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321118.

The product of its digits is 357210, while the sum is 47.

The square root of 71953697 is about 8482.5525049952. The cubic root of 71953697 is about 415.9275657446.

The spelling of 71953697 in words is "seventy-one million, nine hundred fifty-three thousand, six hundred ninety-seven".