54961999 has 2 divisors, whose sum is σ = 54962000. Its totient is φ = 54961998.

The previous prime is 54961997. The next prime is 54962021. The reversal of 54961999 is 99916945.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54961999 - 2¹ = 54961997 is a prime.

Together with 54961997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54961997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27480999 + 27481000.

It is an arithmetic number, because the mean of its divisors is an integer number (27481000).

Almost surely, 2^54961999 is an apocalyptic number.

54961999 is a deficient number, since it is larger than the sum of its proper divisors (1).

54961999 is an equidigital number, since it uses as much as digits as its factorization.

54961999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 787320, while the sum is 52.

The square root of 54961999 is about 7413.6360175018. The cubic root of 54961999 is about 380.2076404443.

The spelling of 54961999 in words is "fifty-four million, nine hundred sixty-one thousand, nine hundred ninety-nine".