1957011647 has 4 divisors (see below), whose sum is σ = 2060012280. Its totient is φ = 1854011016.

The previous prime is 1957011629. The next prime is 1957011677. The reversal of 1957011647 is 7461107591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7461107591 = 7 ⋅1065872513.

It is a cyclic number.

It is not a de Polignac number, because 1957011647 - 2⁸ = 1957011391 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 (1957011607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51500288 + ... + 51500325.

It is an arithmetic number, because the mean of its divisors is an integer number (515003070).

Almost surely, 2^1957011647 is an apocalyptic number.

1957011647 is a deficient number, since it is larger than the sum of its proper divisors (103000633).

1957011647 is a wasteful number, since it uses less digits than its factorization.

1957011647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103000632.

The product of its (nonzero) digits is 52920, while the sum is 41.

The square root of 1957011647 is about 44238.1243612339. The cubic root of 1957011647 is about 1250.8286019736.

The spelling of 1957011647 in words is "one billion, nine hundred fifty-seven million, eleven thousand, six hundred forty-seven".