2154681937 has 2 divisors, whose sum is σ = 2154681938. Its totient is φ = 2154681936.

The previous prime is 2154681931. The next prime is 2154682007. The reversal of 2154681937 is 7391864512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1825767441 + 328914496 = 42729^2 + 18136^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154681937 - 2¹¹ = 2154679889 is a prime.

It is not a weakly prime, because it can be changed into another prime (2154681931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077340968 + 1077340969.

It is an arithmetic number, because the mean of its divisors is an integer number (1077340969).

Almost surely, 2^2154681937 is an apocalyptic number.

It is an amenable number.

2154681937 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154681937 is an equidigital number, since it uses as much as digits as its factorization.

2154681937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The square root of 2154681937 is about 46418.5516469439. The cubic root of 2154681937 is about 1291.5990700128.

The spelling of 2154681937 in words is "two billion, one hundred fifty-four million, six hundred eighty-one thousand, nine hundred thirty-seven".