87949453 has 2 divisors, whose sum is σ = 87949454. Its totient is φ = 87949452.

The previous prime is 87949441. The next prime is 87949501. The reversal of 87949453 is 35494978.

87949453 is nontrivially palindromic in base 14.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80964004 + 6985449 = 8998^2 + 2643^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87949453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87949397 and 87949406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87949403) 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, 43974726 + 43974727.

It is an arithmetic number, because the mean of its divisors is an integer number (43974727).

Almost surely, 2^87949453 is an apocalyptic number.

It is an amenable number.

87949453 is a deficient number, since it is larger than the sum of its proper divisors (1).

87949453 is an equidigital number, since it uses as much as digits as its factorization.

87949453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 49.

The square root of 87949453 is about 9378.1369685029. The cubic root of 87949453 is about 444.7108385288.

The spelling of 87949453 in words is "eighty-seven million, nine hundred forty-nine thousand, four hundred fifty-three".