54431779 has 2 divisors, whose sum is σ = 54431780. Its totient is φ = 54431778.

The previous prime is 54431771. The next prime is 54431801. The reversal of 54431779 is 97713445.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54431779 - 2³ = 54431771 is a prime.

It is not a weakly prime, because it can be changed into another prime (54431771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27215889 + 27215890.

It is an arithmetic number, because the mean of its divisors is an integer number (27215890).

Almost surely, 2^54431779 is an apocalyptic number.

54431779 is a deficient number, since it is larger than the sum of its proper divisors (1).

54431779 is an equidigital number, since it uses as much as digits as its factorization.

54431779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 40.

The square root of 54431779 is about 7377.7895741204. The cubic root of 54431779 is about 378.9810629562.

It can be divided in two parts, 544 and 31779, that added together give a palindrome (32323).

The spelling of 54431779 in words is "fifty-four million, four hundred thirty-one thousand, seven hundred seventy-nine".