1961353925 has 12 divisors (see below), whose sum is σ = 2440010496. Its totient is φ = 1563966000.

The previous prime is 1961353873. The next prime is 1961353939. The reversal of 1961353925 is 5293531691.

It is not a de Polignac number, because 1961353925 - 2¹² = 1961349829 is a prime.

It is a super-2 number, since 2×1961353925² = 7693818438225811250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120101 + ... + 135450.

It is an arithmetic number, because the mean of its divisors is an integer number (203334208).

Almost surely, 2^1961353925 is an apocalyptic number.

It is an amenable number.

1961353925 is a deficient number, since it is larger than the sum of its proper divisors (478656571).

1961353925 is a wasteful number, since it uses less digits than its factorization.

1961353925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255868 (or 255863 counting only the distinct ones).

The product of its digits is 218700, while the sum is 44.

The square root of 1961353925 is about 44287.1756268110. The cubic root of 1961353925 is about 1251.7530443192.

The spelling of 1961353925 in words is "one billion, nine hundred sixty-one million, three hundred fifty-three thousand, nine hundred twenty-five".