690369883225 has 27 divisors (see below), whose sum is σ = 941019324511. Its totient is φ = 502053952400.

The previous prime is 690369883139. The next prime is 690369883237. The reversal of 690369883225 is 522388963096.

The square root of 690369883225 is 830885.

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

It can be written as a sum of positive squares in only one way, i.e., 248533157961 + 441836725264 = 498531^2 + 664708^2 .

It is a de Polignac number, because none of the positive numbers 2^k-690369883225 is a prime.

It is a super-2 number, since 2×690369883225² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 45691122 + ... + 45706228.

Almost surely, 2^690369883225 is an apocalyptic number.

690369883225 is the 830885-th square number.

690369883225 is the 415443-rd centered octagonal number.

It is an amenable number.

690369883225 is a deficient number, since it is larger than the sum of its proper divisors (250649441286).

690369883225 is an frugal number, since it uses more digits than its factorization.

690369883225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30246 (or 15123 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 61.

The spelling of 690369883225 in words is "six hundred ninety billion, three hundred sixty-nine million, eight hundred eighty-three thousand, two hundred twenty-five".