1961700407 has 4 divisors (see below), whose sum is σ = 1961819376. Its totient is φ = 1961581440.

The previous prime is 1961700401. The next prime is 1961700439. The reversal of 1961700407 is 7040071691.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1961700407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961700401) 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, 29819 + ... + 69372.

It is an arithmetic number, because the mean of its divisors is an integer number (490454844).

Almost surely, 2^1961700407 is an apocalyptic number.

1961700407 is a deficient number, since it is larger than the sum of its proper divisors (118969).

1961700407 is an equidigital number, since it uses as much as digits as its factorization.

1961700407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118968.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 1961700407 is about 44291.0872185364. The cubic root of 1961700407 is about 1251.8267492493.

The spelling of 1961700407 in words is "one billion, nine hundred sixty-one million, seven hundred thousand, four hundred seven".