1961431048 has 8 divisors (see below), whose sum is σ = 3677683230. Its totient is φ = 980715520.

The previous prime is 1961430967. The next prime is 1961431057. The reversal of 1961431048 is 8401341691.

It can be written as a sum of positive squares in only one way, i.e., 1020291364 + 941139684 = 31942^2 + 30678^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1961430998 and 1961431016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122589433 + ... + 122589448.

Almost surely, 2^1961431048 is an apocalyptic number.

It is an amenable number.

1961431048 is a deficient number, since it is larger than the sum of its proper divisors (1716252182).

1961431048 is a wasteful number, since it uses less digits than its factorization.

1961431048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245178887 (or 245178883 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 1961431048 is about 44288.0463330682. The cubic root of 1961431048 is about 1251.7694509594.

The spelling of 1961431048 in words is "one billion, nine hundred sixty-one million, four hundred thirty-one thousand, forty-eight".