54421999987 has 2 divisors, whose sum is σ = 54421999988. Its totient is φ = 54421999986.

The previous prime is 54421999897. The next prime is 54422000027. The reversal of 54421999987 is 78999912445.

Together with previous prime (54421999897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 54421999987 - 2²³ = 54413611379 is a prime.

It is not a weakly prime, because it can be changed into another prime (54421999187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27210999993 + 27210999994.

It is an arithmetic number, because the mean of its divisors is an integer number (27210999994).

Almost surely, 2^54421999987 is an apocalyptic number.

54421999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

54421999987 is an equidigital number, since it uses as much as digits as its factorization.

54421999987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58786560, while the sum is 67.

The spelling of 54421999987 in words is "fifty-four billion, four hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred eighty-seven".