1350969621 has 4 divisors (see below), whose sum is σ = 1801292832. Its totient is φ = 900646412.

The previous prime is 1350969593. The next prime is 1350969667. The reversal of 1350969621 is 1269690531.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1269690531 = 3 ⋅423230177.

It is a cyclic number.

It is not a de Polignac number, because 1350969621 - 2⁵ = 1350969589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1350968621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225161601 + ... + 225161606.

It is an arithmetic number, because the mean of its divisors is an integer number (450323208).

Almost surely, 2^1350969621 is an apocalyptic number.

It is an amenable number.

1350969621 is a deficient number, since it is larger than the sum of its proper divisors (450323211).

1350969621 is an equidigital number, since it uses as much as digits as its factorization.

1350969621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450323210.

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 1350969621 is about 36755.5386438561. The cubic root of 1350969621 is about 1105.4739873282.

The spelling of 1350969621 in words is "one billion, three hundred fifty million, nine hundred sixty-nine thousand, six hundred twenty-one".