1202400109 has 2 divisors, whose sum is σ = 1202400110. Its totient is φ = 1202400108.

The previous prime is 1202400103. The next prime is 1202400119. The reversal of 1202400109 is 9010042021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 887444100 + 314956009 = 29790^2 + 17747^2 .

It is an emirp because it is prime and its reverse (9010042021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1202400109 - 2⁵ = 1202400077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202400103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601200054 + 601200055.

It is an arithmetic number, because the mean of its divisors is an integer number (601200055).

Almost surely, 2^1202400109 is an apocalyptic number.

It is an amenable number.

1202400109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202400109 is an equidigital number, since it uses as much as digits as its factorization.

1202400109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1202400109 is about 34675.6414360283. The cubic root of 1202400109 is about 1063.3665685922.

The spelling of 1202400109 in words is "one billion, two hundred two million, four hundred thousand, one hundred nine".