1961167001 has 4 divisors (see below), whose sum is σ = 1961408100. Its totient is φ = 1960925904.

The previous prime is 1961166989. The next prime is 1961167007. The reversal of 1961167001 is 1007611691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1007611691 = 16381 ⋅61511.

It can be written as a sum of positive squares in 2 ways, for example, as 327067225 + 1634099776 = 18085^2 + 40424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1961167001 is a prime.

It is a super-2 number, since 2×1961167001² = 7692352011622668002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961167007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107906 + ... + 124763.

It is an arithmetic number, because the mean of its divisors is an integer number (490352025).

Almost surely, 2^1961167001 is an apocalyptic number.

It is an amenable number.

1961167001 is a deficient number, since it is larger than the sum of its proper divisors (241099).

1961167001 is an equidigital number, since it uses as much as digits as its factorization.

1961167001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241098.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 1961167001 is about 44285.0652139070. The cubic root of 1961167001 is about 1251.7132775512.

Adding to 1961167001 its reverse (1007611691), we get a palindrome (2968778692).

The spelling of 1961167001 in words is "one billion, nine hundred sixty-one million, one hundred sixty-seven thousand, one".