37949421 has 4 divisors (see below), whose sum is σ = 50599232. Its totient is φ = 25299612.

The previous prime is 37949399. The next prime is 37949473. The reversal of 37949421 is 12494973.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 37949421 - 2⁶ = 37949357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 37949421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37949221) 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, 6324901 + ... + 6324906.

It is an arithmetic number, because the mean of its divisors is an integer number (12649808).

Almost surely, 2^37949421 is an apocalyptic number.

It is an amenable number.

37949421 is a deficient number, since it is larger than the sum of its proper divisors (12649811).

37949421 is a wasteful number, since it uses less digits than its factorization.

37949421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12649810.

The product of its digits is 54432, while the sum is 39.

The square root of 37949421 is about 6160.3101382966. The cubic root of 37949421 is about 336.0483118598.

The spelling of 37949421 in words is "thirty-seven million, nine hundred forty-nine thousand, four hundred twenty-one".