69312500 has 42 divisors (see below), whose sum is σ = 151755870. Its totient is φ = 27700000.

The previous prime is 69312487. The next prime is 69312527. The reversal of 69312500 is 521396.

It can be written as a sum of positive squares in 7 ways, for example, as 60621796 + 8690704 = 7786^2 + 2948^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 69312500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 61946 + ... + 63054.

It is an arithmetic number, because the mean of its divisors is an integer number (3613235).

Almost surely, 2^69312500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69312500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75877935).

69312500 is an abundant number, since it is smaller than the sum of its proper divisors (82443370).

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

69312500 is an equidigital number, since it uses as much as digits as its factorization.

69312500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143 (or 1116 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 69312500 is about 8325.4129026734. The cubic root of 69312500 is about 410.7748582910.

Adding to 69312500 its reverse (521396), we get a palindrome (69833896).

The spelling of 69312500 in words is "sixty-nine million, three hundred twelve thousand, five hundred".