1968064537 has 2 divisors, whose sum is σ = 1968064538. Its totient is φ = 1968064536.

The previous prime is 1968064531. The next prime is 1968064541. The reversal of 1968064537 is 7354608691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1886686096 + 81378441 = 43436^2 + 9021^2 .

It is a cyclic number.

It is not a de Polignac number, because 1968064537 - 2⁷ = 1968064409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1968064531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984032268 + 984032269.

It is an arithmetic number, because the mean of its divisors is an integer number (984032269).

Almost surely, 2^1968064537 is an apocalyptic number.

It is an amenable number.

1968064537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968064537 is an equidigital number, since it uses as much as digits as its factorization.

1968064537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 1968064537 is about 44362.8734078396. The cubic root of 1968064537 is about 1253.1790094917.

The spelling of 1968064537 in words is "one billion, nine hundred sixty-eight million, sixty-four thousand, five hundred thirty-seven".