1642790493 has 12 divisors (see below), whose sum is σ = 2373411040. Its totient is φ = 1094966856.

The previous prime is 1642790489. The next prime is 1642790509. The reversal of 1642790493 is 3940972461.

It is a happy number.

It is not a de Polignac number, because 1642790493 - 2² = 1642790489 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 (1642790423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35088 + ... + 67206.

Almost surely, 2^1642790493 is an apocalyptic number.

It is an amenable number.

1642790493 is a deficient number, since it is larger than the sum of its proper divisors (730620547).

1642790493 is a wasteful number, since it uses less digits than its factorization.

1642790493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37808 (or 37805 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 1642790493 is about 40531.3519759704. The cubic root of 1642790493 is about 1179.9421816447.

The spelling of 1642790493 in words is "one billion, six hundred forty-two million, seven hundred ninety thousand, four hundred ninety-three".