403809025 has 9 divisors (see below), whose sum is σ = 500847811. Its totient is φ = 322966840.

The previous prime is 403809019. The next prime is 403809031. The reversal of 403809025 is 520908304.

The square root of 403809025 is 20095.

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

It is an interprime number because it is at equal distance from previous prime (403809019) and next prime (403809031).

It can be written as a sum of positive squares in only one way, i.e., 145371249 + 258437776 = 12057^2 + 16076^2 .

It is not a de Polignac number, because 403809025 - 2³ = 403809017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 98466 + ... + 102484.

Almost surely, 2^403809025 is an apocalyptic number.

403809025 is the 20095-th square number.

403809025 is the 10048-th centered octagonal number.

It is an amenable number.

403809025 is a deficient number, since it is larger than the sum of its proper divisors (97038786).

403809025 is an frugal number, since it uses more digits than its factorization.

403809025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8048 (or 4024 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The cubic root of 403809025 is about 739.1376764335.

The spelling of 403809025 in words is "four hundred three million, eight hundred nine thousand, twenty-five".