37123421 has 4 divisors (see below), whose sum is σ = 37135644. Its totient is φ = 37111200.

The previous prime is 37123417. The next prime is 37123423. The reversal of 37123421 is 12432173.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 25867396 + 11256025 = 5086^2 + 3355^2 .

It is a cyclic number.

It is not a de Polignac number, because 37123421 - 2² = 37123417 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 (37123423) 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, 2351 + ... + 8931.

It is an arithmetic number, because the mean of its divisors is an integer number (9283911).

Almost surely, 2^37123421 is an apocalyptic number.

It is an amenable number.

37123421 is a deficient number, since it is larger than the sum of its proper divisors (12223).

37123421 is an equidigital number, since it uses as much as digits as its factorization.

37123421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12222.

The product of its digits is 1008, while the sum is 23.

The square root of 37123421 is about 6092.8992277897. The cubic root of 37123421 is about 333.5922840038.

Adding to 37123421 its reverse (12432173), we get a palindrome (49555594).

The spelling of 37123421 in words is "thirty-seven million, one hundred twenty-three thousand, four hundred twenty-one".