1612990811 has 2 divisors, whose sum is σ = 1612990812. Its totient is φ = 1612990810.

The previous prime is 1612990781. The next prime is 1612990823. The reversal of 1612990811 is 1180992161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1612990811 - 2¹⁰ = 1612989787 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1612990891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806495405 + 806495406.

It is an arithmetic number, because the mean of its divisors is an integer number (806495406).

Almost surely, 2^1612990811 is an apocalyptic number.

1612990811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1612990811 is an equidigital number, since it uses as much as digits as its factorization.

1612990811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 38.

The square root of 1612990811 is about 40162.0568571880. The cubic root of 1612990811 is about 1172.7640135117.

The spelling of 1612990811 in words is "one billion, six hundred twelve million, nine hundred ninety thousand, eight hundred eleven".