1490943493 has 4 divisors (see below), whose sum is σ = 1605631468. Its totient is φ = 1376255520.

The previous prime is 1490943479. The next prime is 1490943499. The reversal of 1490943493 is 3943490941.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3943490941 = 13 ⋅303345457.

It can be written as a sum of positive squares in 2 ways, for example, as 395134884 + 1095808609 = 19878^2 + 33103^2 .

It is a cyclic number.

It is not a de Polignac number, because 1490943493 - 2²⁵ = 1457389061 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 (1490943499) 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, 57343968 + ... + 57343993.

It is an arithmetic number, because the mean of its divisors is an integer number (401407867).

Almost surely, 2^1490943493 is an apocalyptic number.

1490943493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1490943493 is a deficient number, since it is larger than the sum of its proper divisors (114687975).

1490943493 is a wasteful number, since it uses less digits than its factorization.

1490943493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114687974.

The product of its (nonzero) digits is 419904, while the sum is 46.

The square root of 1490943493 is about 38612.7374450453. The cubic root of 1490943493 is about 1142.4057876146.

The spelling of 1490943493 in words is "one billion, four hundred ninety million, nine hundred forty-three thousand, four hundred ninety-three".