1361213137 has 4 divisors (see below), whose sum is σ = 1441284516. Its totient is φ = 1281141760.

The previous prime is 1361213129. The next prime is 1361213153. The reversal of 1361213137 is 7313121631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 993762576 + 367450561 = 31524^2 + 19169^2 .

It is not a de Polignac number, because 1361213137 - 2³ = 1361213129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361213177) 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, 40035664 + ... + 40035697.

It is an arithmetic number, because the mean of its divisors is an integer number (360321129).

Almost surely, 2^1361213137 is an apocalyptic number.

1361213137 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1361213137 is a deficient number, since it is larger than the sum of its proper divisors (80071379).

1361213137 is an equidigital number, since it uses as much as digits as its factorization.

1361213137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80071378.

The product of its digits is 2268, while the sum is 28.

The square root of 1361213137 is about 36894.6220606744. The cubic root of 1361213137 is about 1108.2609830750.

Adding to 1361213137 its reverse (7313121631), we get a palindrome (8674334768).

The spelling of 1361213137 in words is "one billion, three hundred sixty-one million, two hundred thirteen thousand, one hundred thirty-seven".