54687709 has 2 divisors, whose sum is σ = 54687710. Its totient is φ = 54687708.

The previous prime is 54687599. The next prime is 54687713. The reversal of 54687709 is 90778645.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28196100 + 26491609 = 5310^2 + 5147^2 .

It is a cyclic number.

It is not a de Polignac number, because 54687709 - 2²³ = 46299101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54687779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27343854 + 27343855.

It is an arithmetic number, because the mean of its divisors is an integer number (27343855).

Almost surely, 2^54687709 is an apocalyptic number.

It is an amenable number.

54687709 is a deficient number, since it is larger than the sum of its proper divisors (1).

54687709 is an equidigital number, since it uses as much as digits as its factorization.

54687709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 54687709 is about 7395.1138598402. The cubic root of 54687709 is about 379.5741050245.

The spelling of 54687709 in words is "fifty-four million, six hundred eighty-seven thousand, seven hundred nine".