1373703421 has 4 divisors (see below), whose sum is σ = 1374363100. Its totient is φ = 1373043744.

The previous prime is 1373703391. The next prime is 1373703467. The reversal of 1373703421 is 1243073731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1243073731 = 103 ⋅12068677.

It can be written as a sum of positive squares in 2 ways, for example, as 1161855396 + 211848025 = 34086^2 + 14555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1373703421 is a prime.

It is a super-2 number, since 2×1373703421² = 3774122177734206482, 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 (1373703491) 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, 326706 + ... + 330883.

It is an arithmetic number, because the mean of its divisors is an integer number (343590775).

Almost surely, 2^1373703421 is an apocalyptic number.

It is an amenable number.

1373703421 is a deficient number, since it is larger than the sum of its proper divisors (659679).

1373703421 is an equidigital number, since it uses as much as digits as its factorization.

1373703421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659678.

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 1373703421 is about 37063.5052443775. The cubic root of 1373703421 is about 1111.6404122270.

The spelling of 1373703421 in words is "one billion, three hundred seventy-three million, seven hundred three thousand, four hundred twenty-one".