897199541 has 4 divisors (see below), whose sum is σ = 1025370912. Its totient is φ = 769028172.

The previous prime is 897199519. The next prime is 897199543. The reversal of 897199541 is 145991798.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 145991798 = 2 ⋅72995899.

It is a cyclic number.

It is not a de Polignac number, because 897199541 - 2¹⁰ = 897198517 is a prime.

It is a super-2 number, since 2×897199541² = 1609934032741221362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897199543) 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, 64085675 + ... + 64085688.

It is an arithmetic number, because the mean of its divisors is an integer number (256342728).

Almost surely, 2^897199541 is an apocalyptic number.

It is an amenable number.

897199541 is a deficient number, since it is larger than the sum of its proper divisors (128171371).

897199541 is a wasteful number, since it uses less digits than its factorization.

897199541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128171370.

The product of its digits is 816480, while the sum is 53.

The square root of 897199541 is about 29953.2893185373. The cubic root of 897199541 is about 964.4869317505.

The spelling of 897199541 in words is "eight hundred ninety-seven million, one hundred ninety-nine thousand, five hundred forty-one".