897039643 has 2 divisors, whose sum is σ = 897039644. Its totient is φ = 897039642.

The previous prime is 897039623. The next prime is 897039667. The reversal of 897039643 is 346930798.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 897039643 - 2²¹ = 894942491 is a prime.

It is a super-2 number, since 2×897039643² = 1609360242227134898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (897039623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448519821 + 448519822.

It is an arithmetic number, because the mean of its divisors is an integer number (448519822).

Almost surely, 2^897039643 is an apocalyptic number.

897039643 is a deficient number, since it is larger than the sum of its proper divisors (1).

897039643 is an equidigital number, since it uses as much as digits as its factorization.

897039643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 897039643 is about 29950.6200770535. The cubic root of 897039643 is about 964.4296317160.

The spelling of 897039643 in words is "eight hundred ninety-seven million, thirty-nine thousand, six hundred forty-three".