1954276789 has 2 divisors, whose sum is σ = 1954276790. Its totient is φ = 1954276788.

The previous prime is 1954276781. The next prime is 1954276813. The reversal of 1954276789 is 9876724591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1711228689 + 243048100 = 41367^2 + 15590^2 .

It is a cyclic number.

It is not a de Polignac number, because 1954276789 - 2³ = 1954276781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1954276781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977138394 + 977138395.

It is an arithmetic number, because the mean of its divisors is an integer number (977138395).

Almost surely, 2^1954276789 is an apocalyptic number.

It is an amenable number.

1954276789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1954276789 is an equidigital number, since it uses as much as digits as its factorization.

1954276789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 58.

The square root of 1954276789 is about 44207.2029085759. The cubic root of 1954276789 is about 1250.2456667018.

The spelling of 1954276789 in words is "one billion, nine hundred fifty-four million, two hundred seventy-six thousand, seven hundred eighty-nine".