1961431473 has 32 divisors (see below), whose sum is σ = 2760376320. Its totient is φ = 1237129920.

The previous prime is 1961431469. The next prime is 1961431489. The reversal of 1961431473 is 3741341691.

It is a happy number.

It is not a de Polignac number, because 1961431473 - 2² = 1961431469 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1961431403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1887288 + ... + 1888326.

It is an arithmetic number, because the mean of its divisors is an integer number (86261760).

Almost surely, 2^1961431473 is an apocalyptic number.

It is an amenable number.

1961431473 is a deficient number, since it is larger than the sum of its proper divisors (798944847).

1961431473 is a wasteful number, since it uses less digits than its factorization.

1961431473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509.

The product of its digits is 54432, while the sum is 39.

The square root of 1961431473 is about 44288.0511312024. The cubic root of 1961431473 is about 1251.7695413699.

The spelling of 1961431473 in words is "one billion, nine hundred sixty-one million, four hundred thirty-one thousand, four hundred seventy-three".