88390919 has 4 divisors (see below), whose sum is σ = 88452480. Its totient is φ = 88329360.

The previous prime is 88390901. The next prime is 88390921. The reversal of 88390919 is 91909388.

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

It is a cyclic number.

It is not a de Polignac number, because 88390919 - 2¹⁶ = 88325383 is a prime.

It is a super-2 number, since 2×88390919² = 15625909123329122, which contains 22 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 (88390999) 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, 28574 + ... + 31515.

It is an arithmetic number, because the mean of its divisors is an integer number (22113120).

Almost surely, 2^88390919 is an apocalyptic number.

88390919 is a deficient number, since it is larger than the sum of its proper divisors (61561).

88390919 is a wasteful number, since it uses less digits than its factorization.

88390919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61560.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 88390919 is about 9401.6444838124. The cubic root of 88390919 is about 445.4536786284.

The spelling of 88390919 in words is "eighty-eight million, three hundred ninety thousand, nine hundred nineteen".