55087699 has 2 divisors, whose sum is σ = 55087700. Its totient is φ = 55087698.

The previous prime is 55087657. The next prime is 55087729. The reversal of 55087699 is 99678055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55087699 - 2¹¹ = 55085651 is a prime.

It is a super-2 number, since 2×55087699² = 6069309162229202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55087649) 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, 27543849 + 27543850.

It is an arithmetic number, because the mean of its divisors is an integer number (27543850).

Almost surely, 2^55087699 is an apocalyptic number.

55087699 is a deficient number, since it is larger than the sum of its proper divisors (1).

55087699 is an equidigital number, since it uses as much as digits as its factorization.

55087699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 55087699 is about 7422.1087973702. The cubic root of 55087699 is about 380.4972691176.

The spelling of 55087699 in words is "fifty-five million, eighty-seven thousand, six hundred ninety-nine".