1954913992 has 8 divisors (see below), whose sum is σ = 3665463750. Its totient is φ = 977456992.

The previous prime is 1954913977. The next prime is 1954913993. The reversal of 1954913992 is 2993194591.

It can be written as a sum of positive squares in only one way, i.e., 1611701316 + 343212676 = 40146^2 + 18526^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1954913992² = 7643377432234752128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1954913993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122182117 + ... + 122182132.

Almost surely, 2^1954913992 is an apocalyptic number.

It is an amenable number.

1954913992 is a deficient number, since it is larger than the sum of its proper divisors (1710549758).

1954913992 is a wasteful number, since it uses less digits than its factorization.

1954913992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244364255 (or 244364251 counting only the distinct ones).

The product of its digits is 787320, while the sum is 52.

The square root of 1954913992 is about 44214.4093254676. The cubic root of 1954913992 is about 1250.3815351596.

The spelling of 1954913992 in words is "one billion, nine hundred fifty-four million, nine hundred thirteen thousand, nine hundred ninety-two".