1402865609 has 2 divisors, whose sum is σ = 1402865610. Its totient is φ = 1402865608.

The previous prime is 1402865603. The next prime is 1402865663. The reversal of 1402865609 is 9065682041.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1281425209 + 121440400 = 35797^2 + 11020^2 .

It is a cyclic number.

It is not a de Polignac number, because 1402865609 - 2²⁴ = 1386088393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1402865603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701432804 + 701432805.

It is an arithmetic number, because the mean of its divisors is an integer number (701432805).

Almost surely, 2^1402865609 is an apocalyptic number.

It is an amenable number.

1402865609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1402865609 is an equidigital number, since it uses as much as digits as its factorization.

1402865609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 1402865609 is about 37454.8476034812. The cubic root of 1402865609 is about 1119.4516897855.

The spelling of 1402865609 in words is "one billion, four hundred two million, eight hundred sixty-five thousand, six hundred nine".