1537491803 has 2 divisors, whose sum is σ = 1537491804. Its totient is φ = 1537491802.

The previous prime is 1537491793. The next prime is 1537491859. The reversal of 1537491803 is 3081947351.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1537491803 - 2²² = 1533297499 is a prime.

It is not a weakly prime, because it can be changed into another prime (1537491503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 768745901 + 768745902.

It is an arithmetic number, because the mean of its divisors is an integer number (768745902).

Almost surely, 2^1537491803 is an apocalyptic number.

1537491803 is a deficient number, since it is larger than the sum of its proper divisors (1).

1537491803 is an equidigital number, since it uses as much as digits as its factorization.

1537491803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 1537491803 is about 39210.8633289297. The cubic root of 1537491803 is about 1154.1730687570.

The spelling of 1537491803 in words is "one billion, five hundred thirty-seven million, four hundred ninety-one thousand, eight hundred three".