6936391225 has 9 divisors (see below), whose sum is σ = 8601641517. Its totient is φ = 5548779840.

The previous prime is 6936391223. The next prime is 6936391247. The reversal of 6936391225 is 5221936396.

The square root of 6936391225 is 83285.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2092788009 + 4843603216 = 45747^2 + 69596^2 .

It is not a de Polignac number, because 6936391225 - 2¹ = 6936391223 is a prime.

It is a super-2 number, since 2×6936391225² = 96227046452514001250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6936391223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 408097 + ... + 424753.

Almost surely, 2^6936391225 is an apocalyptic number.

6936391225 is the 83285-th square number.

6936391225 is the 41643-rd centered octagonal number.

It is an amenable number.

6936391225 is a deficient number, since it is larger than the sum of its proper divisors (1665250292).

6936391225 is an frugal number, since it uses more digits than its factorization.

6936391225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33324 (or 16662 counting only the distinct ones).

The product of its digits is 524880, while the sum is 46.

The cubic root of 6936391225 is about 1907.1192948583.

It can be divided in two parts, 6936 and 391225, that added together give a square (398161 = 631²).

The spelling of 6936391225 in words is "six billion, nine hundred thirty-six million, three hundred ninety-one thousand, two hundred twenty-five".