1401620013 has 12 divisors (see below), whose sum is σ = 2029667068. Its totient is φ = 932057280.

The previous prime is 1401620009. The next prime is 1401620047. The reversal of 1401620013 is 3100261041.

It is a happy number.

1401620013 is a `hidden beast` number, since 1 + 40 + 1 + 620 + 0 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 530012484 + 871607529 = 23022^2 + 29523^2 .

It is not a de Polignac number, because 1401620013 - 2² = 1401620009 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 (1401620093) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 192568 + ... + 199713.

Almost surely, 2^1401620013 is an apocalyptic number.

It is an amenable number.

1401620013 is a deficient number, since it is larger than the sum of its proper divisors (628047055).

1401620013 is a wasteful number, since it uses less digits than its factorization.

1401620013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392684 (or 392681 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1401620013 is about 37438.2159430708. The cubic root of 1401620013 is about 1119.1202735210.

Adding to 1401620013 its reverse (3100261041), we get a palindrome (4501881054).

The spelling of 1401620013 in words is "one billion, four hundred one million, six hundred twenty thousand, thirteen".