920870453 has 4 divisors (see below), whose sum is σ = 923122380. Its totient is φ = 918618528.

The previous prime is 920870449. The next prime is 920870479. The reversal of 920870453 is 354078029.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 354078029 = 10267 ⋅34487.

It can be written as a sum of positive squares in 2 ways, for example, as 464919844 + 455950609 = 21562^2 + 21353^2 .

It is a cyclic number.

It is not a de Polignac number, because 920870453 - 2² = 920870449 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 (926870453) 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, 1125350 + ... + 1126167.

It is an arithmetic number, because the mean of its divisors is an integer number (230780595).

Almost surely, 2^920870453 is an apocalyptic number.

It is an amenable number.

920870453 is a deficient number, since it is larger than the sum of its proper divisors (2251927).

920870453 is a wasteful number, since it uses less digits than its factorization.

920870453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251926.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 920870453 is about 30345.8473765357. The cubic root of 920870453 is about 972.8954660747.

The spelling of 920870453 in words is "nine hundred twenty million, eight hundred seventy thousand, four hundred fifty-three".