88390213 has 4 divisors (see below), whose sum is σ = 88600588. Its totient is φ = 88179840.

The previous prime is 88390193. The next prime is 88390249. The reversal of 88390213 is 31209388.

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 2883204 + 85507009 = 1698^2 + 9247^2 .

It is a cyclic number.

It is not a de Polignac number, because 88390213 - 2⁹ = 88389701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88390283) 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, 104556 + ... + 105397.

It is an arithmetic number, because the mean of its divisors is an integer number (22150147).

Almost surely, 2^88390213 is an apocalyptic number.

It is an amenable number.

88390213 is a deficient number, since it is larger than the sum of its proper divisors (210375).

88390213 is a wasteful number, since it uses less digits than its factorization.

88390213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210374.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 88390213 is about 9401.6069371145. The cubic root of 88390213 is about 445.4524926426.

The spelling of 88390213 in words is "eighty-eight million, three hundred ninety thousand, two hundred thirteen".