869621541 has 4 divisors (see below), whose sum is σ = 1159495392. Its totient is φ = 579747692.

The previous prime is 869621527. The next prime is 869621549. The reversal of 869621541 is 145126968.

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.

It is a cyclic number.

It is not a de Polignac number, because 869621541 - 2¹⁵ = 869588773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 869621493 and 869621502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869621549) 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, 144936921 + ... + 144936926.

It is an arithmetic number, because the mean of its divisors is an integer number (289873848).

Almost surely, 2^869621541 is an apocalyptic number.

It is an amenable number.

869621541 is a deficient number, since it is larger than the sum of its proper divisors (289873851).

869621541 is a wasteful number, since it uses less digits than its factorization.

869621541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289873850.

The product of its digits is 103680, while the sum is 42.

The square root of 869621541 is about 29489.3462287654. The cubic root of 869621541 is about 954.5018247277.

The spelling of 869621541 in words is "eight hundred sixty-nine million, six hundred twenty-one thousand, five hundred forty-one".