1955317477 has 2 divisors, whose sum is σ = 1955317478. Its totient is φ = 1955317476.

The previous prime is 1955317459. The next prime is 1955317513. The reversal of 1955317477 is 7747135591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1954170436 + 1147041 = 44206^2 + 1071^2 .

It is a cyclic number.

It is not a de Polignac number, because 1955317477 - 2⁷ = 1955317349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1955317477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1955315477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977658738 + 977658739.

It is an arithmetic number, because the mean of its divisors is an integer number (977658739).

Almost surely, 2^1955317477 is an apocalyptic number.

It is an amenable number.

1955317477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1955317477 is an equidigital number, since it uses as much as digits as its factorization.

1955317477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 926100, while the sum is 49.

The square root of 1955317477 is about 44218.9719125174. The cubic root of 1955317477 is about 1250.4675535198.

The spelling of 1955317477 in words is "one billion, nine hundred fifty-five million, three hundred seventeen thousand, four hundred seventy-seven".