1200404869 has 2 divisors, whose sum is σ = 1200404870. Its totient is φ = 1200404868.

The previous prime is 1200404837. The next prime is 1200404873. The reversal of 1200404869 is 9684040021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 830304225 + 370100644 = 28815^2 + 19238^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200404869 - 2⁵ = 1200404837 is a prime.

It is a super-2 number, since 2×1200404869² = 2881943699037814322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200404069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600202434 + 600202435.

It is an arithmetic number, because the mean of its divisors is an integer number (600202435).

Almost surely, 2^1200404869 is an apocalyptic number.

It is an amenable number.

1200404869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200404869 is an equidigital number, since it uses as much as digits as its factorization.

1200404869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 1200404869 is about 34646.8594392046. The cubic root of 1200404869 is about 1062.7780661646.

The spelling of 1200404869 in words is "one billion, two hundred million, four hundred four thousand, eight hundred sixty-nine".