1954913977 has 2 divisors, whose sum is σ = 1954913978. Its totient is φ = 1954913976.

The previous prime is 1954913969. The next prime is 1954913993. The reversal of 1954913977 is 7793194591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1463139001 + 491774976 = 38251^2 + 22176^2 .

It is a cyclic number.

It is not a de Polignac number, because 1954913977 - 2³ = 1954913969 is a prime.

It is not a weakly prime, because it can be changed into another prime (1954913377) 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, 977456988 + 977456989.

It is an arithmetic number, because the mean of its divisors is an integer number (977456989).

Almost surely, 2^1954913977 is an apocalyptic number.

It is an amenable number.

1954913977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1954913977 is an equidigital number, since it uses as much as digits as its factorization.

1954913977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2143260, while the sum is 55.

The square root of 1954913977 is about 44214.4091558397. The cubic root of 1954913977 is about 1250.3815319615.

The spelling of 1954913977 in words is "one billion, nine hundred fifty-four million, nine hundred thirteen thousand, nine hundred seventy-seven".