1964894413 has 2 divisors, whose sum is σ = 1964894414. Its totient is φ = 1964894412.

The previous prime is 1964894411. The next prime is 1964894419. The reversal of 1964894413 is 3144984691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1035681124 + 929213289 = 32182^2 + 30483^2 .

It is an emirp because it is prime and its reverse (3144984691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1964894413 - 2¹ = 1964894411 is a prime.

It is a super-2 number, since 2×1964894413² = 7721620108477229138, which contains 22 as substring.

Together with 1964894411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1964894411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982447206 + 982447207.

It is an arithmetic number, because the mean of its divisors is an integer number (982447207).

Almost surely, 2^1964894413 is an apocalyptic number.

It is an amenable number.

1964894413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964894413 is an equidigital number, since it uses as much as digits as its factorization.

1964894413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 49.

The square root of 1964894413 is about 44327.1295371130. The cubic root of 1964894413 is about 1252.5057815970.

The spelling of 1964894413 in words is "one billion, nine hundred sixty-four million, eight hundred ninety-four thousand, four hundred thirteen".