25147993 has 16 divisors (see below), whose sum is σ = 28498176. Its totient is φ = 22017600.

The previous prime is 25147949. The next prime is 25148027. The reversal of 25147993 is 39974152.

It is a cyclic number.

It is not a de Polignac number, because 25147993 - 2⁹ = 25147481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25147093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44871 + ... + 45427.

It is an arithmetic number, because the mean of its divisors is an integer number (1781136).

Almost surely, 2^25147993 is an apocalyptic number.

25147993 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25147993 is a deficient number, since it is larger than the sum of its proper divisors (3350183).

25147993 is a wasteful number, since it uses less digits than its factorization.

25147993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744.

The product of its digits is 68040, while the sum is 40.

The square root of 25147993 is about 5014.7774626597. Note that the first 3 decimals coincide. The cubic root of 25147993 is about 292.9776179092.

The spelling of 25147993 in words is "twenty-five million, one hundred forty-seven thousand, nine hundred ninety-three".