1961401747 has 16 divisors (see below), whose sum is σ = 2112677280. Its totient is φ = 1817222400.

The previous prime is 1961401733. The next prime is 1961401759. The reversal of 1961401747 is 7471041691.

It is a cyclic number.

It is not a de Polignac number, because 1961401747 - 2²⁷ = 1827184019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961401447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59008 + ... + 86050.

It is an arithmetic number, because the mean of its divisors is an integer number (132042330).

Almost surely, 2^1961401747 is an apocalyptic number.

1961401747 is a deficient number, since it is larger than the sum of its proper divisors (151275533).

1961401747 is a wasteful number, since it uses less digits than its factorization.

1961401747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27174.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 1961401747 is about 44287.7155315105. The cubic root of 1961401747 is about 1251.7632177079.

The spelling of 1961401747 in words is "one billion, nine hundred sixty-one million, four hundred one thousand, seven hundred forty-seven".