88425721 has 4 divisors (see below), whose sum is σ = 93627252. Its totient is φ = 83224192.

The previous prime is 88425709. The next prime is 88425739. The reversal of 88425721 is 12752488.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24601600 + 63824121 = 4960^2 + 7989^2 .

It is a cyclic number.

It is not a de Polignac number, because 88425721 - 2⁹ = 88425209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88425761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2600740 + ... + 2600773.

It is an arithmetic number, because the mean of its divisors is an integer number (23406813).

Almost surely, 2^88425721 is an apocalyptic number.

It is an amenable number.

88425721 is a deficient number, since it is larger than the sum of its proper divisors (5201531).

88425721 is a wasteful number, since it uses less digits than its factorization.

88425721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5201530.

The product of its digits is 35840, while the sum is 37.

The square root of 88425721 is about 9403.4951480819. The cubic root of 88425721 is about 445.5121335200.

The spelling of 88425721 in words is "eighty-eight million, four hundred twenty-five thousand, seven hundred twenty-one".