55087649 has 2 divisors, whose sum is σ = 55087650. Its totient is φ = 55087648.

The previous prime is 55087621. The next prime is 55087657. The reversal of 55087649 is 94678055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39627025 + 15460624 = 6295^2 + 3932^2 .

It is a cyclic number.

It is not a de Polignac number, because 55087649 - 2¹⁶ = 55022113 is a prime.

It is not a weakly prime, because it can be changed into another prime (55087699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27543824 + 27543825.

It is an arithmetic number, because the mean of its divisors is an integer number (27543825).

Almost surely, 2^55087649 is an apocalyptic number.

It is an amenable number.

55087649 is a deficient number, since it is larger than the sum of its proper divisors (1).

55087649 is an equidigital number, since it uses as much as digits as its factorization.

55087649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 55087649 is about 7422.1054290545. The cubic root of 55087649 is about 380.4971539989.

The spelling of 55087649 in words is "fifty-five million, eighty-seven thousand, six hundred forty-nine".