88220909 has 4 divisors (see below), whose sum is σ = 100823904. Its totient is φ = 75617916.

The previous prime is 88220903. The next prime is 88220911. The reversal of 88220909 is 90902288.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 88220909 - 2¹² = 88216813 is a prime.

It is a super-3 number, since 3×88220909³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88220903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6301487 + ... + 6301500.

It is an arithmetic number, because the mean of its divisors is an integer number (25205976).

Almost surely, 2^88220909 is an apocalyptic number.

It is an amenable number.

88220909 is a deficient number, since it is larger than the sum of its proper divisors (12602995).

88220909 is a wasteful number, since it uses less digits than its factorization.

88220909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12602994.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 88220909 is about 9392.5986287076. The cubic root of 88220909 is about 445.1679019656.

The spelling of 88220909 in words is "eighty-eight million, two hundred twenty thousand, nine hundred nine".