1964054381 has 2 divisors, whose sum is σ = 1964054382. Its totient is φ = 1964054380.

The previous prime is 1964054359. The next prime is 1964054413. The reversal of 1964054381 is 1834504691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1608731881 + 355322500 = 40109^2 + 18850^2 .

It is a cyclic number.

It is not a de Polignac number, because 1964054381 - 2²⁶ = 1896945517 is a prime.

It is a super-2 number, since 2×1964054381² = 7715019223050586322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1964059381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982027190 + 982027191.

It is an arithmetic number, because the mean of its divisors is an integer number (982027191).

Almost surely, 2^1964054381 is an apocalyptic number.

It is an amenable number.

1964054381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964054381 is an equidigital number, since it uses as much as digits as its factorization.

1964054381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 1964054381 is about 44317.6531531172. The cubic root of 1964054381 is about 1252.3272656586.

The spelling of 1964054381 in words is "one billion, nine hundred sixty-four million, fifty-four thousand, three hundred eighty-one".