1490694187 has 2 divisors, whose sum is σ = 1490694188. Its totient is φ = 1490694186.

The previous prime is 1490694133. The next prime is 1490694199. The reversal of 1490694187 is 7814960941.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1490694187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1490694187.

It is not a weakly prime, because it can be changed into another prime (1490694587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745347093 + 745347094.

It is an arithmetic number, because the mean of its divisors is an integer number (745347094).

Almost surely, 2^1490694187 is an apocalyptic number.

1490694187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1490694187 is an equidigital number, since it uses as much as digits as its factorization.

1490694187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 1490694187 is about 38609.5090230373. The cubic root of 1490694187 is about 1142.3421088110.

The spelling of 1490694187 in words is "one billion, four hundred ninety million, six hundred ninety-four thousand, one hundred eighty-seven".