71918101 has 4 divisors (see below), whose sum is σ = 72931104. Its totient is φ = 70905100.

The previous prime is 71918069. The next prime is 71918113. The reversal of 71918101 is 10181917.

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 71918101 - 2⁵ = 71918069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71918101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71918501) 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, 506395 + ... + 506536.

It is an arithmetic number, because the mean of its divisors is an integer number (18232776).

Almost surely, 2^71918101 is an apocalyptic number.

71918101 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

71918101 is a deficient number, since it is larger than the sum of its proper divisors (1013003).

71918101 is a wasteful number, since it uses less digits than its factorization.

71918101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013002.

The product of its (nonzero) digits is 504, while the sum is 28.

The square root of 71918101 is about 8480.4540562401. The cubic root of 71918101 is about 415.8589670005.

The spelling of 71918101 in words is "seventy-one million, nine hundred eighteen thousand, one hundred one".