1164801961 has 2 divisors, whose sum is σ = 1164801962. Its totient is φ = 1164801960.

The previous prime is 1164801947. The next prime is 1164802019. The reversal of 1164801961 is 1691084611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1079516736 + 85285225 = 32856^2 + 9235^2 .

It is a cyclic number.

It is not a de Polignac number, because 1164801961 - 2¹⁷ = 1164670889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1164801961.

It is not a weakly prime, because it can be changed into another prime (1164801941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582400980 + 582400981.

It is an arithmetic number, because the mean of its divisors is an integer number (582400981).

Almost surely, 2^1164801961 is an apocalyptic number.

1164801961 is the 19705-th hex number.

It is an amenable number.

1164801961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1164801961 is an equidigital number, since it uses as much as digits as its factorization.

1164801961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 1164801961 is about 34129.1951414035. The cubic root of 1164801961 is about 1052.1654361716.

The spelling of 1164801961 in words is "one billion, one hundred sixty-four million, eight hundred one thousand, nine hundred sixty-one".