1490736991 has 2 divisors, whose sum is σ = 1490736992. Its totient is φ = 1490736990.

The previous prime is 1490736983. The next prime is 1490737007. The reversal of 1490736991 is 1996370941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1490736991 - 2³ = 1490736983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1490736911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745368495 + 745368496.

It is an arithmetic number, because the mean of its divisors is an integer number (745368496).

Almost surely, 2^1490736991 is an apocalyptic number.

1490736991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1490736991 is an equidigital number, since it uses as much as digits as its factorization.

1490736991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 1490736991 is about 38610.0633384614. The cubic root of 1490736991 is about 1142.3530424964.

The spelling of 1490736991 in words is "one billion, four hundred ninety million, seven hundred thirty-six thousand, nine hundred ninety-one".