1961895437 has 8 divisors (see below), whose sum is σ = 2020114200. Its totient is φ = 1903950144.

The previous prime is 1961895413. The next prime is 1961895451. The reversal of 1961895437 is 7345981691.

It can be written as a sum of positive squares in 4 ways, for example, as 100922116 + 1860973321 = 10046^2 + 43139^2 .

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

It is not a de Polignac number, because 1961895437 - 2¹⁰ = 1961894413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961892437) 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, 53762 + ... + 82547.

It is an arithmetic number, because the mean of its divisors is an integer number (252514275).

Almost surely, 2^1961895437 is an apocalyptic number.

It is an amenable number.

1961895437 is a deficient number, since it is larger than the sum of its proper divisors (58218763).

1961895437 is a wasteful number, since it uses less digits than its factorization.

1961895437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136735.

The product of its digits is 1632960, while the sum is 53.

The square root of 1961895437 is about 44293.2888483120. The cubic root of 1961895437 is about 1251.8682329335.

The spelling of 1961895437 in words is "one billion, nine hundred sixty-one million, eight hundred ninety-five thousand, four hundred thirty-seven".