1490821949 has 2 divisors, whose sum is σ = 1490821950. Its totient is φ = 1490821948.

The previous prime is 1490821933. The next prime is 1490821957. The reversal of 1490821949 is 9491280941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1216753924 + 274068025 = 34882^2 + 16555^2 .

It is a cyclic number.

It is not a de Polignac number, because 1490821949 - 2⁴ = 1490821933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1490820949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745410974 + 745410975.

It is an arithmetic number, because the mean of its divisors is an integer number (745410975).

Almost surely, 2^1490821949 is an apocalyptic number.

It is an amenable number.

1490821949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1490821949 is an equidigital number, since it uses as much as digits as its factorization.

1490821949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 1490821949 is about 38611.1635281818. The cubic root of 1490821949 is about 1142.3747432137.

The spelling of 1490821949 in words is "one billion, four hundred ninety million, eight hundred twenty-one thousand, nine hundred forty-nine".