1959613949 has 4 divisors (see below), whose sum is σ = 1967239164. Its totient is φ = 1951988736.

The previous prime is 1959613939. The next prime is 1959613951. The reversal of 1959613949 is 9493169591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1066022500 + 893591449 = 32650^2 + 29893^2 .

It is a cyclic number.

It is not a de Polignac number, because 1959613949 - 2⁴ = 1959613933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1959613894 and 1959613903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1959613939) 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, 3812222 + ... + 3812735.

It is an arithmetic number, because the mean of its divisors is an integer number (491809791).

Almost surely, 2^1959613949 is an apocalyptic number.

It is an amenable number.

1959613949 is a deficient number, since it is larger than the sum of its proper divisors (7625215).

1959613949 is an equidigital number, since it uses as much as digits as its factorization.

1959613949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7625214.

The product of its digits is 2361960, while the sum is 56.

The square root of 1959613949 is about 44267.5270260267. The cubic root of 1959613949 is about 1251.3827788940.

The spelling of 1959613949 in words is "one billion, nine hundred fifty-nine million, six hundred thirteen thousand, nine hundred forty-nine".