1954129479 has 16 divisors (see below), whose sum is σ = 2636789760. Its totient is φ = 1287133760.

The previous prime is 1954129403. The next prime is 1954129511. The reversal of 1954129479 is 9749214591.

It is a cyclic number.

It is not a de Polignac number, because 1954129479 - 2⁷ = 1954129351 is a prime.

It is a super-2 number, since 2×1954129479² = 7637244041393622882, which contains 22 as substring.

Its product of digits (816480) is a multiple of the sum of its prime divisors (5670).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1954129279) 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 in 15 ways as a sum of consecutive naturals, for example, 561904 + ... + 565370.

It is an arithmetic number, because the mean of its divisors is an integer number (164799360).

Almost surely, 2^1954129479 is an apocalyptic number.

1954129479 is a deficient number, since it is larger than the sum of its proper divisors (682660281).

1954129479 is a wasteful number, since it uses less digits than its factorization.

1954129479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5670.

The product of its digits is 816480, while the sum is 51.

The square root of 1954129479 is about 44205.5367459779. The cubic root of 1954129479 is about 1250.2142521281.

The spelling of 1954129479 in words is "one billion, nine hundred fifty-four million, one hundred twenty-nine thousand, four hundred seventy-nine".