1964879281 has 8 divisors (see below), whose sum is σ = 2116394720. Its totient is φ = 1818173952.

The previous prime is 1964879249. The next prime is 1964879291. The reversal of 1964879281 is 1829784691.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1964879281 - 2⁵ = 1964879249 is a prime.

It is a super-2 number, since 2×1964879281² = 7721501177806153922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1964879201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1201680 + ... + 1203313.

It is an arithmetic number, because the mean of its divisors is an integer number (264549340).

Almost surely, 2^1964879281 is an apocalyptic number.

It is an amenable number.

1964879281 is a deficient number, since it is larger than the sum of its proper divisors (151515439).

1964879281 is a wasteful number, since it uses less digits than its factorization.

1964879281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2405055.

The product of its digits is 1741824, while the sum is 55.

The square root of 1964879281 is about 44326.9588512454. The cubic root of 1964879281 is about 1252.5025663325.

The spelling of 1964879281 in words is "one billion, nine hundred sixty-four million, eight hundred seventy-nine thousand, two hundred eighty-one".