71097912 has 112 divisors (see below), whose sum is σ = 203822640. Its totient is φ = 23234688.

The previous prime is 71097907. The next prime is 71097941. The reversal of 71097912 is 21979017.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 425653 + ... + 425819.

It is an arithmetic number, because the mean of its divisors is an integer number (1819845).

Almost surely, 2^71097912 is an apocalyptic number.

71097912 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71097912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101911320).

71097912 is an abundant number, since it is smaller than the sum of its proper divisors (132724728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71097912 is a wasteful number, since it uses less digits than its factorization.

71097912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 71097912 is about 8431.9577797804. The cubic root of 71097912 is about 414.2720329325.

The spelling of 71097912 in words is "seventy-one million, ninety-seven thousand, nine hundred twelve".