1351603891 has 8 divisors (see below), whose sum is σ = 1485086400. Its totient is φ = 1219889640.

The previous prime is 1351603889. The next prime is 1351603951. The reversal of 1351603891 is 1983061531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1351603891 - 2¹ = 1351603889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1351603891.

It is not an unprimeable number, because it can be changed into a prime (1351603861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440461 + ... + 443518.

It is an arithmetic number, because the mean of its divisors is an integer number (185635800).

Almost surely, 2^1351603891 is an apocalyptic number.

1351603891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1351603891 is a deficient number, since it is larger than the sum of its proper divisors (133482509).

1351603891 is a wasteful number, since it uses less digits than its factorization.

1351603891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884129.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 1351603891 is about 36764.1658548103. The cubic root of 1351603891 is about 1105.6469641474.

The spelling of 1351603891 in words is "one billion, three hundred fifty-one million, six hundred three thousand, eight hundred ninety-one".