1490353921 has 4 divisors (see below), whose sum is σ = 1703261632. Its totient is φ = 1277446212.

The previous prime is 1490353919. The next prime is 1490353927. The reversal of 1490353921 is 1293530941.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1293530941 = 127 ⋅10185283.

It is not a de Polignac number, because 1490353921 - 2¹ = 1490353919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1490353927) 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, 106453845 + ... + 106453858.

It is an arithmetic number, because the mean of its divisors is an integer number (425815408).

Almost surely, 2^1490353921 is an apocalyptic number.

It is an amenable number.

1490353921 is a deficient number, since it is larger than the sum of its proper divisors (212907711).

1490353921 is an equidigital number, since it uses as much as digits as its factorization.

1490353921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212907710.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 1490353921 is about 38605.1022664103. The cubic root of 1490353921 is about 1142.2551851567.

The spelling of 1490353921 in words is "one billion, four hundred ninety million, three hundred fifty-three thousand, nine hundred twenty-one".