1158061813 has 2 divisors, whose sum is σ = 1158061814. Its totient is φ = 1158061812.

The previous prime is 1158061787. The next prime is 1158061829. The reversal of 1158061813 is 3181608511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1109089809 + 48972004 = 33303^2 + 6998^2 .

It is a cyclic number.

It is not a de Polignac number, because 1158061813 - 2⁵ = 1158061781 is a prime.

It is a super-2 number, since 2×1158061813² = 2682214325457693938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1158061013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 579030906 + 579030907.

It is an arithmetic number, because the mean of its divisors is an integer number (579030907).

Almost surely, 2^1158061813 is an apocalyptic number.

It is an amenable number.

1158061813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1158061813 is an equidigital number, since it uses as much as digits as its factorization.

1158061813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 1158061813 is about 34030.3072716072. The cubic root of 1158061813 is about 1050.1320508148.

The spelling of 1158061813 in words is "one billion, one hundred fifty-eight million, sixty-one thousand, eight hundred thirteen".