1356029509 has 4 divisors (see below), whose sum is σ = 1379013120. Its totient is φ = 1333045900.

The previous prime is 1356029489. The next prime is 1356029513. The reversal of 1356029509 is 9059206531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1356029509 - 2²⁷ = 1221811781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356029579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11491717 + ... + 11491834.

It is an arithmetic number, because the mean of its divisors is an integer number (344753280).

Almost surely, 2^1356029509 is an apocalyptic number.

It is an amenable number.

1356029509 is a deficient number, since it is larger than the sum of its proper divisors (22983611).

1356029509 is an equidigital number, since it uses as much as digits as its factorization.

1356029509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22983610.

The product of its (nonzero) digits is 72900, while the sum is 40.

The square root of 1356029509 is about 36824.3059540842. The cubic root of 1356029509 is about 1106.8524061137.

The spelling of 1356029509 in words is "one billion, three hundred fifty-six million, twenty-nine thousand, five hundred nine".