88906421 has 2 divisors, whose sum is σ = 88906422. Its totient is φ = 88906420.

The previous prime is 88906403. The next prime is 88906423. The reversal of 88906421 is 12460988.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88642225 + 264196 = 9415^2 + 514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88906421 is a prime.

Together with 88906423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88906423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44453210 + 44453211.

It is an arithmetic number, because the mean of its divisors is an integer number (44453211).

Almost surely, 2^88906421 is an apocalyptic number.

It is an amenable number.

88906421 is a deficient number, since it is larger than the sum of its proper divisors (1).

88906421 is an equidigital number, since it uses as much as digits as its factorization.

88906421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 88906421 is about 9429.0201505777. The cubic root of 88906421 is about 446.3179728914.

The spelling of 88906421 in words is "eighty-eight million, nine hundred six thousand, four hundred twenty-one".