1961167439 has 8 divisors (see below), whose sum is σ = 2445091968. Its totient is φ = 1528182360.

The previous prime is 1961167367. The next prime is 1961167469. The reversal of 1961167439 is 9347611691.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1961167439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1961167393 and 1961167402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961167469) 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, 12734777 + ... + 12734930.

It is an arithmetic number, because the mean of its divisors is an integer number (305636496).

Almost surely, 2^1961167439 is an apocalyptic number.

1961167439 is a deficient number, since it is larger than the sum of its proper divisors (483924529).

1961167439 is a wasteful number, since it uses less digits than its factorization.

1961167439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25469725.

The product of its digits is 244944, while the sum is 47.

The square root of 1961167439 is about 44285.0701591405. The cubic root of 1961167439 is about 1251.7133707355.

The spelling of 1961167439 in words is "one billion, nine hundred sixty-one million, one hundred sixty-seven thousand, four hundred thirty-nine".