1953720101 has 4 divisors (see below), whose sum is σ = 1953984672. Its totient is φ = 1953455532.

The previous prime is 1953720077. The next prime is 1953720113. The reversal of 1953720101 is 1010273591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1953720101 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 (1953720001) 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, 120881 + ... + 136086.

It is an arithmetic number, because the mean of its divisors is an integer number (488496168).

Almost surely, 2^1953720101 is an apocalyptic number.

It is an amenable number.

1953720101 is a deficient number, since it is larger than the sum of its proper divisors (264571).

1953720101 is an equidigital number, since it uses as much as digits as its factorization.

1953720101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264570.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 1953720101 is about 44200.9061106218. The cubic root of 1953720101 is about 1250.1269419881.

Adding to 1953720101 its reverse (1010273591), we get a palindrome (2963993692).

The spelling of 1953720101 in words is "one billion, nine hundred fifty-three million, seven hundred twenty thousand, one hundred one".