1963918957 has 16 divisors (see below), whose sum is σ = 2636871552. Its totient is φ = 1412608320.

The previous prime is 1963918951. The next prime is 1963918987. The reversal of 1963918957 is 7598193691.

It is a cyclic number.

It is not a de Polignac number, because 1963918957 - 2³ = 1963918949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1963918951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 979978 + ... + 981979.

It is an arithmetic number, because the mean of its divisors is an integer number (164804472).

Almost surely, 2^1963918957 is an apocalyptic number.

It is an amenable number.

1963918957 is a deficient number, since it is larger than the sum of its proper divisors (672952595).

1963918957 is a wasteful number, since it uses less digits than its factorization.

1963918957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961988.

The product of its digits is 3674160, while the sum is 58.

The square root of 1963918957 is about 44316.1252480404. The cubic root of 1963918957 is about 1252.2984818212.

The spelling of 1963918957 in words is "one billion, nine hundred sixty-three million, nine hundred eighteen thousand, nine hundred fifty-seven".