88690213 has 2 divisors, whose sum is σ = 88690214. Its totient is φ = 88690212.

The previous prime is 88690211. The next prime is 88690223. The reversal of 88690213 is 31209688.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86434209 + 2256004 = 9297^2 + 1502^2 .

It is a cyclic number.

It is not a de Polignac number, because 88690213 - 2¹ = 88690211 is a prime.

Together with 88690211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88690211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44345106 + 44345107.

It is an arithmetic number, because the mean of its divisors is an integer number (44345107).

Almost surely, 2^88690213 is an apocalyptic number.

It is an amenable number.

88690213 is a deficient number, since it is larger than the sum of its proper divisors (1).

88690213 is an equidigital number, since it uses as much as digits as its factorization.

88690213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 88690213 is about 9417.5481416343. The cubic root of 88690213 is about 445.9558848897.

The spelling of 88690213 in words is "eighty-eight million, six hundred ninety thousand, two hundred thirteen".