1965390747 has 8 divisors (see below), whose sum is σ = 2620741200. Its totient is φ = 1310150400.

The previous prime is 1965390737. The next prime is 1965390751. The reversal of 1965390747 is 7470935691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1965390747 - 2⁶ = 1965390683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1965390747.

It is not an unprimeable number, because it can be changed into a prime (1965390727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33379 + ... + 71027.

It is an arithmetic number, because the mean of its divisors is an integer number (327592650).

Almost surely, 2^1965390747 is an apocalyptic number.

1965390747 is a deficient number, since it is larger than the sum of its proper divisors (655350453).

1965390747 is a wasteful number, since it uses less digits than its factorization.

1965390747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55053.

The product of its (nonzero) digits is 1428840, while the sum is 51.

The square root of 1965390747 is about 44332.7277189212. The cubic root of 1965390747 is about 1252.6112340603.

The spelling of 1965390747 in words is "one billion, nine hundred sixty-five million, three hundred ninety thousand, seven hundred forty-seven".