1401203613 has 4 divisors (see below), whose sum is σ = 1868271488. Its totient is φ = 934135740.

The previous prime is 1401203591. The next prime is 1401203623. The reversal of 1401203613 is 3163021041.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3163021041 = 3 ⋅1054340347.

It is not a de Polignac number, because 1401203613 - 2⁶ = 1401203549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1401203613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401203623) 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, 233533933 + ... + 233533938.

It is an arithmetic number, because the mean of its divisors is an integer number (467067872).

Almost surely, 2^1401203613 is an apocalyptic number.

It is an amenable number.

1401203613 is a deficient number, since it is larger than the sum of its proper divisors (467067875).

1401203613 is an equidigital number, since it uses as much as digits as its factorization.

1401203613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467067874.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1401203613 is about 37432.6543675439. The cubic root of 1401203613 is about 1119.0094380038.

Adding to 1401203613 its reverse (3163021041), we get a palindrome (4564224654).

The spelling of 1401203613 in words is "one billion, four hundred one million, two hundred three thousand, six hundred thirteen".