55873409 has 2 divisors, whose sum is σ = 55873410. Its totient is φ = 55873408.

The previous prime is 55873351. The next prime is 55873427. The reversal of 55873409 is 90437855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41319184 + 14554225 = 6428^2 + 3815^2 .

It is a cyclic number.

It is not a de Polignac number, because 55873409 - 2¹² = 55869313 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55873009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27936704 + 27936705.

It is an arithmetic number, because the mean of its divisors is an integer number (27936705).

Almost surely, 2^55873409 is an apocalyptic number.

It is an amenable number.

55873409 is a deficient number, since it is larger than the sum of its proper divisors (1).

55873409 is an equidigital number, since it uses as much as digits as its factorization.

55873409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 55873409 is about 7474.8517711056. The cubic root of 55873409 is about 382.2977334918.

The spelling of 55873409 in words is "fifty-five million, eight hundred seventy-three thousand, four hundred nine".