1490320687 has 4 divisors (see below), whose sum is σ = 1490397976. Its totient is φ = 1490243400.

The previous prime is 1490320679. The next prime is 1490320723. The reversal of 1490320687 is 7860230941.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7860230941 = 367 ⋅21417523.

It is a cyclic number.

It is not a de Polignac number, because 1490320687 - 2³ = 1490320679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1490320087) 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, 16708 + ... + 57094.

It is an arithmetic number, because the mean of its divisors is an integer number (372599494).

Almost surely, 2^1490320687 is an apocalyptic number.

1490320687 is a deficient number, since it is larger than the sum of its proper divisors (77289).

1490320687 is an equidigital number, since it uses as much as digits as its factorization.

1490320687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77288.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 1490320687 is about 38604.6718286790. The cubic root of 1490320687 is about 1142.2466945580.

The spelling of 1490320687 in words is "one billion, four hundred ninety million, three hundred twenty thousand, six hundred eighty-seven".