1953116437 has 4 divisors (see below), whose sum is σ = 1973251756. Its totient is φ = 1932981120.

The previous prime is 1953116423. The next prime is 1953116453. The reversal of 1953116437 is 7346113591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7346113591 = 53759 ⋅136649.

It can be written as a sum of positive squares in 2 ways, for example, as 1596322116 + 356794321 = 39954^2 + 18889^2 .

It is a cyclic number.

It is not a de Polignac number, because 1953116437 - 2¹¹ = 1953114389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1953116437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1953156437) 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, 10067514 + ... + 10067707.

It is an arithmetic number, because the mean of its divisors is an integer number (493312939).

Almost surely, 2^1953116437 is an apocalyptic number.

It is an amenable number.

1953116437 is a deficient number, since it is larger than the sum of its proper divisors (20135319).

1953116437 is an equidigital number, since it uses as much as digits as its factorization.

1953116437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20135318.

The product of its digits is 68040, while the sum is 40.

The square root of 1953116437 is about 44194.0769447672. The cubic root of 1953116437 is about 1249.9981732240.

The spelling of 1953116437 in words is "one billion, nine hundred fifty-three million, one hundred sixteen thousand, four hundred thirty-seven".