25009403 has 2 divisors, whose sum is σ = 25009404. Its totient is φ = 25009402.

The previous prime is 25009393. The next prime is 25009417. The reversal of 25009403 is 30490052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25009403 - 2⁸ = 25009147 is a prime.

It is equal to p_1566500 and since 25009403 and 1566500 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (25009423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12504701 + 12504702.

It is an arithmetic number, because the mean of its divisors is an integer number (12504702).

Almost surely, 2^25009403 is an apocalyptic number.

25009403 is a deficient number, since it is larger than the sum of its proper divisors (1).

25009403 is an equidigital number, since it uses as much as digits as its factorization.

25009403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 25009403 is about 5000.9402116002. The cubic root of 25009403 is about 292.4384286112.

Adding to 25009403 its reverse (30490052), we get a palindrome (55499455).

The spelling of 25009403 in words is "twenty-five million, nine thousand, four hundred three".