1013121437 has 4 divisors (see below), whose sum is σ = 1013348700. Its totient is φ = 1012894176.

The previous prime is 1013121427. The next prime is 1013121449. The reversal of 1013121437 is 7341213101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7341213101 = 4159 ⋅1765139.

It can be written as a sum of positive squares in 2 ways, for example, as 848615161 + 164506276 = 29131^2 + 12826^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1013121437 is a prime.

It is a super-2 number, since 2×1013121437² = 2052830092217889938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013121407) 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, 106808 + ... + 115905.

It is an arithmetic number, because the mean of its divisors is an integer number (253337175).

Almost surely, 2^1013121437 is an apocalyptic number.

It is an amenable number.

1013121437 is a deficient number, since it is larger than the sum of its proper divisors (227263).

1013121437 is an equidigital number, since it uses as much as digits as its factorization.

1013121437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227262.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1013121437 is about 31829.5685958827. The cubic root of 1013121437 is about 1004.3548203442.

Adding to 1013121437 its reverse (7341213101), we get a palindrome (8354334538).

The spelling of 1013121437 in words is "one billion, thirteen million, one hundred twenty-one thousand, four hundred thirty-seven".