1891925234 has 4 divisors (see below), whose sum is σ = 2837887854. Its totient is φ = 945962616.

The previous prime is 1891925227. The next prime is 1891925239. The reversal of 1891925234 is 4325291981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4325291981 = 10079 ⋅429139.

It can be written as a sum of positive squares in only one way, i.e., 1810077025 + 81848209 = 42545^2 + 9047^2 .

It is not an unprimeable number, because it can be changed into a prime (1891925239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472981307 + ... + 472981310.

Almost surely, 2^1891925234 is an apocalyptic number.

1891925234 is a deficient number, since it is larger than the sum of its proper divisors (945962620).

1891925234 is an equidigital number, since it uses as much as digits as its factorization.

1891925234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945962619.

The product of its digits is 155520, while the sum is 44.

The square root of 1891925234 is about 43496.2668972867. The cubic root of 1891925234 is about 1236.8052590425.

The spelling of 1891925234 in words is "one billion, eight hundred ninety-one million, nine hundred twenty-five thousand, two hundred thirty-four".