690146225 has 6 divisors (see below), whose sum is σ = 855781350. Its totient is φ = 552116960.

The previous prime is 690146207. The next prime is 690146239. The reversal of 690146225 is 522641096.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 4596736 + 685549489 = 2144^2 + 26183^2 .

It is not a de Polignac number, because 690146225 - 2⁸ = 690145969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13802900 + ... + 13802949.

It is an arithmetic number, because the mean of its divisors is an integer number (142630225).

Almost surely, 2^690146225 is an apocalyptic number.

It is an amenable number.

690146225 is a deficient number, since it is larger than the sum of its proper divisors (165635125).

690146225 is a wasteful number, since it uses less digits than its factorization.

690146225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27605859 (or 27605854 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 690146225 is about 26270.6342709878. The cubic root of 690146225 is about 883.7180093478.

The spelling of 690146225 in words is "six hundred ninety million, one hundred forty-six thousand, two hundred twenty-five".