87949553 has 2 divisors, whose sum is σ = 87949554. Its totient is φ = 87949552.

The previous prime is 87949541. The next prime is 87949559. The reversal of 87949553 is 35594978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66308449 + 21641104 = 8143^2 + 4652^2 .

It is a cyclic number.

It is not a de Polignac number, because 87949553 - 2¹⁴ = 87933169 is a prime.

It is not a weakly prime, because it can be changed into another prime (87949559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43974776 + 43974777.

It is an arithmetic number, because the mean of its divisors is an integer number (43974777).

Almost surely, 2^87949553 is an apocalyptic number.

It is an amenable number.

87949553 is a deficient number, since it is larger than the sum of its proper divisors (1).

87949553 is an equidigital number, since it uses as much as digits as its factorization.

87949553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360800, while the sum is 50.

The square root of 87949553 is about 9378.1423000507. The cubic root of 87949553 is about 444.7110070767.

The spelling of 87949553 in words is "eighty-seven million, nine hundred forty-nine thousand, five hundred fifty-three".