842641497 has 6 divisors (see below), whose sum is σ = 1217148842. Its totient is φ = 561760992.

The previous prime is 842641493. The next prime is 842641519. The reversal of 842641497 is 794146248.

It can be written as a sum of positive squares in only one way, i.e., 736633881 + 106007616 = 27141^2 + 10296^2 .

It is not a de Polignac number, because 842641497 - 2² = 842641493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842641493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46813408 + ... + 46813425.

Almost surely, 2^842641497 is an apocalyptic number.

It is an amenable number.

842641497 is a deficient number, since it is larger than the sum of its proper divisors (374507345).

842641497 is a wasteful number, since it uses less digits than its factorization.

842641497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93626839 (or 93626836 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 842641497 is about 29028.2878757945. The cubic root of 842641497 is about 944.5267908787.

The spelling of 842641497 in words is "eight hundred forty-two million, six hundred forty-one thousand, four hundred ninety-seven".