88642649 has 2 divisors, whose sum is σ = 88642650. Its totient is φ = 88642648.

The previous prime is 88642643. The next prime is 88642679. The reversal of 88642649 is 94624688.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70023424 + 18619225 = 8368^2 + 4315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88642649 is a prime.

It is not a weakly prime, because it can be changed into another prime (88642643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44321324 + 44321325.

It is an arithmetic number, because the mean of its divisors is an integer number (44321325).

Almost surely, 2^88642649 is an apocalyptic number.

It is an amenable number.

88642649 is a deficient number, since it is larger than the sum of its proper divisors (1).

88642649 is an equidigital number, since it uses as much as digits as its factorization.

88642649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 47.

The square root of 88642649 is about 9415.0225172328. The cubic root of 88642649 is about 445.8761495278.

The spelling of 88642649 in words is "eighty-eight million, six hundred forty-two thousand, six hundred forty-nine".