1490836657 has 4 divisors (see below), whose sum is σ = 1495630656. Its totient is φ = 1486042660.

The previous prime is 1490836601. The next prime is 1490836673. The reversal of 1490836657 is 7566380941.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1490836657 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 1490836657.

It is not an unprimeable number, because it can be changed into a prime (1490836687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2396533 + ... + 2397154.

It is an arithmetic number, because the mean of its divisors is an integer number (373907664).

Almost surely, 2^1490836657 is an apocalyptic number.

It is an amenable number.

1490836657 is a deficient number, since it is larger than the sum of its proper divisors (4793999).

1490836657 is an equidigital number, since it uses as much as digits as its factorization.

1490836657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4793998.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 1490836657 is about 38611.3539907629. The cubic root of 1490836657 is about 1142.3784999763.

The spelling of 1490836657 in words is "one billion, four hundred ninety million, eight hundred thirty-six thousand, six hundred fifty-seven".