842973451 has 4 divisors (see below), whose sum is σ = 844794592. Its totient is φ = 841152312.

The previous prime is 842973449. The next prime is 842973473. The reversal of 842973451 is 154379248.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 842973451 - 2¹ = 842973449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 842973398 and 842973407.

It is not an unprimeable number, because it can be changed into a prime (842973401) 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, 909876 + ... + 910801.

It is an arithmetic number, because the mean of its divisors is an integer number (211198648).

Almost surely, 2^842973451 is an apocalyptic number.

842973451 is a deficient number, since it is larger than the sum of its proper divisors (1821141).

842973451 is a wasteful number, since it uses less digits than its factorization.

842973451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821140.

The product of its digits is 241920, while the sum is 43.

The square root of 842973451 is about 29034.0050802503. The cubic root of 842973451 is about 944.6508049796.

The spelling of 842973451 in words is "eight hundred forty-two million, nine hundred seventy-three thousand, four hundred fifty-one".