1891342869 has 8 divisors (see below), whose sum is σ = 2715774432. Its totient is φ = 1163903280.

The previous prime is 1891342841. The next prime is 1891342879. The reversal of 1891342869 is 9682431981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1891342869 - 2⁸ = 1891342613 is a prime.

It is a super-2 number, since 2×1891342869² = 7154355696234302322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1891342879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24247947 + ... + 24248024.

It is an arithmetic number, because the mean of its divisors is an integer number (339471804).

Almost surely, 2^1891342869 is an apocalyptic number.

It is an amenable number.

1891342869 is a deficient number, since it is larger than the sum of its proper divisors (824431563).

1891342869 is a wasteful number, since it uses less digits than its factorization.

1891342869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48495987.

The product of its digits is 746496, while the sum is 51.

The square root of 1891342869 is about 43489.5719569646. The cubic root of 1891342869 is about 1236.6783431725.

The spelling of 1891342869 in words is "one billion, eight hundred ninety-one million, three hundred forty-two thousand, eight hundred sixty-nine".