1351604491 has 2 divisors, whose sum is σ = 1351604492. Its totient is φ = 1351604490.

The previous prime is 1351604489. The next prime is 1351604531. The reversal of 1351604491 is 1944061531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1351604491 - 2¹ = 1351604489 is a prime.

Together with 1351604489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1351604411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 675802245 + 675802246.

It is an arithmetic number, because the mean of its divisors is an integer number (675802246).

Almost surely, 2^1351604491 is an apocalyptic number.

1351604491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1351604491 is an equidigital number, since it uses as much as digits as its factorization.

1351604491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1351604491 is about 36764.1740149293. The cubic root of 1351604491 is about 1105.6471277525.

The spelling of 1351604491 in words is "one billion, three hundred fifty-one million, six hundred four thousand, four hundred ninety-one".