1642529997 has 12 divisors (see below), whose sum is σ = 2376241504. Its totient is φ = 1093313160.

The previous prime is 1642529983. The next prime is 1642530013. The reversal of 1642529997 is 7999252461.

It is not a de Polignac number, because 1642529997 - 2¹¹ = 1642527949 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 (1642522997) 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, 136129 + ... + 147702.

Almost surely, 2^1642529997 is an apocalyptic number.

It is an amenable number.

1642529997 is a deficient number, since it is larger than the sum of its proper divisors (733711507).

1642529997 is a wasteful number, since it uses less digits than its factorization.

1642529997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284480 (or 284477 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 1642529997 is about 40528.1383362226. The cubic root of 1642529997 is about 1179.8798108458.

The spelling of 1642529997 in words is "one billion, six hundred forty-two million, five hundred twenty-nine thousand, nine hundred ninety-seven".