1202402309 has 2 divisors, whose sum is σ = 1202402310. Its totient is φ = 1202402308.

The previous prime is 1202402287. The next prime is 1202402351. The reversal of 1202402309 is 9032042021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 828173284 + 374229025 = 28778^2 + 19345^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202402309 - 2²⁴ = 1185625093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202402389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601201154 + 601201155.

It is an arithmetic number, because the mean of its divisors is an integer number (601201155).

Almost surely, 2^1202402309 is an apocalyptic number.

It is an amenable number.

1202402309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202402309 is an equidigital number, since it uses as much as digits as its factorization.

1202402309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1202402309 is about 34675.6731585704. The cubic root of 1202402309 is about 1063.3672171298.

The spelling of 1202402309 in words is "one billion, two hundred two million, four hundred two thousand, three hundred nine".