55379977 has 2 divisors, whose sum is σ = 55379978. Its totient is φ = 55379976.

The previous prime is 55379953. The next prime is 55379993. The reversal of 55379977 is 77997355.

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., 49406841 + 5973136 = 7029^2 + 2444^2 .

It is a cyclic number.

It is not a de Polignac number, because 55379977 - 2¹¹ = 55377929 is a prime.

It is not a weakly prime, because it can be changed into another prime (55379477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27689988 + 27689989.

It is an arithmetic number, because the mean of its divisors is an integer number (27689989).

Almost surely, 2^55379977 is an apocalyptic number.

It is an amenable number.

55379977 is a deficient number, since it is larger than the sum of its proper divisors (1).

55379977 is an equidigital number, since it uses as much as digits as its factorization.

55379977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2083725, while the sum is 52.

The square root of 55379977 is about 7441.7724367250. The cubic root of 55379977 is about 381.1690154242.

The spelling of 55379977 in words is "fifty-five million, three hundred seventy-nine thousand, nine hundred seventy-seven".