25321493 has 2 divisors, whose sum is σ = 25321494. Its totient is φ = 25321492.

The previous prime is 25321489. The next prime is 25321501. The reversal of 25321493 is 39412352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18472804 + 6848689 = 4298^2 + 2617^2 .

It is a cyclic number.

It is not a de Polignac number, because 25321493 - 2² = 25321489 is a prime.

It is equal to p_1584722 and since 25321493 and 1584722 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25321393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12660746 + 12660747.

It is an arithmetic number, because the mean of its divisors is an integer number (12660747).

Almost surely, 2^25321493 is an apocalyptic number.

It is an amenable number.

25321493 is a deficient number, since it is larger than the sum of its proper divisors (1).

25321493 is an equidigital number, since it uses as much as digits as its factorization.

25321493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 29.

The square root of 25321493 is about 5032.0466015330. The cubic root of 25321493 is about 293.6498407283.

The spelling of 25321493 in words is "twenty-five million, three hundred twenty-one thousand, four hundred ninety-three".