1352209749 has 16 divisors (see below), whose sum is σ = 1968273984. Its totient is φ = 818928000.

The previous prime is 1352209711. The next prime is 1352209769. The reversal of 1352209749 is 9479022531.

It is not a de Polignac number, because 1352209749 - 2⁸ = 1352209493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1352209749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1352209769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33849 + ... + 62049.

It is an arithmetic number, because the mean of its divisors is an integer number (123017124).

Almost surely, 2^1352209749 is an apocalyptic number.

It is an amenable number.

1352209749 is a deficient number, since it is larger than the sum of its proper divisors (616064235).

1352209749 is a wasteful number, since it uses less digits than its factorization.

1352209749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29668.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 1352209749 is about 36772.4047214756. The cubic root of 1352209749 is about 1105.8121419776.

The spelling of 1352209749 in words is "one billion, three hundred fifty-two million, two hundred nine thousand, seven hundred forty-nine".