997400025 has 18 divisors (see below), whose sum is σ = 1786454670. Its totient is φ = 531946560.

The previous prime is 997400023. The next prime is 997400059. The reversal of 997400025 is 520004799.

It can be written as a sum of positive squares in 3 ways, for example, as 14953689 + 982446336 = 3867^2 + 31344^2 .

It is not a de Polignac number, because 997400025 - 2¹ = 997400023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (997400023) 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 17 ways as a sum of consecutive naturals, for example, 2216220 + ... + 2216669.

Almost surely, 2^997400025 is an apocalyptic number.

It is an amenable number.

997400025 is a deficient number, since it is larger than the sum of its proper divisors (789054645).

997400025 is a wasteful number, since it uses less digits than its factorization.

997400025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4432905 (or 4432897 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 997400025 is about 31581.6406318608. The cubic root of 997400025 is about 999.1325894832.

The spelling of 997400025 in words is "nine hundred ninety-seven million, four hundred thousand, twenty-five".