1140019961 has 2 divisors, whose sum is σ = 1140019962. Its totient is φ = 1140019960.

The previous prime is 1140019919. The next prime is 1140019967. The reversal of 1140019961 is 1699100411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 761484025 + 378535936 = 27595^2 + 19456^2 .

It is a cyclic number.

It is not a de Polignac number, because 1140019961 - 2⁶ = 1140019897 is a prime.

It is a super-3 number, since 3×1140019961³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1140019967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 570009980 + 570009981.

It is an arithmetic number, because the mean of its divisors is an integer number (570009981).

Almost surely, 2^1140019961 is an apocalyptic number.

It is an amenable number.

1140019961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1140019961 is an equidigital number, since it uses as much as digits as its factorization.

1140019961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 1140019961 is about 33764.1816278730. The cubic root of 1140019961 is about 1044.6500239029.

The spelling of 1140019961 in words is "one billion, one hundred forty million, nineteen thousand, nine hundred sixty-one".