1961687707 has 18 divisors (see below), whose sum is σ = 2319022428. Its totient is φ = 1654207632.

The previous prime is 1961687701. The next prime is 1961687729. The reversal of 1961687707 is 7077861691.

It is not a de Polignac number, because 1961687707 - 2¹⁹ = 1961163419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961687701) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2537373 + ... + 2538145.

Almost surely, 2^1961687707 is an apocalyptic number.

1961687707 is a deficient number, since it is larger than the sum of its proper divisors (357334721).

1961687707 is an frugal number, since it uses more digits than its factorization.

1961687707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 52.

The square root of 1961687707 is about 44290.9438486018. The cubic root of 1961687707 is about 1251.8240478116.

The spelling of 1961687707 in words is "one billion, nine hundred sixty-one million, six hundred eighty-seven thousand, seven hundred seven".