87949321 has 2 divisors, whose sum is σ = 87949322. Its totient is φ = 87949320.

The previous prime is 87949307. The next prime is 87949363. The reversal of 87949321 is 12394978.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45373696 + 42575625 = 6736^2 + 6525^2 .

It is a cyclic number.

It is not a de Polignac number, because 87949321 - 2⁵ = 87949289 is a prime.

It is a super-2 number, since 2×87949321² = 15470166128722082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87949391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43974660 + 43974661.

It is an arithmetic number, because the mean of its divisors is an integer number (43974661).

Almost surely, 2^87949321 is an apocalyptic number.

It is an amenable number.

87949321 is a deficient number, since it is larger than the sum of its proper divisors (1).

87949321 is an equidigital number, since it uses as much as digits as its factorization.

87949321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 87949321 is about 9378.1299308551. The cubic root of 87949321 is about 444.7106160455.

The spelling of 87949321 in words is "eighty-seven million, nine hundred forty-nine thousand, three hundred twenty-one".