37974397 has 4 divisors (see below), whose sum is σ = 38273536. Its totient is φ = 37675260.

The previous prime is 37974367. The next prime is 37974439. The reversal of 37974397 is 79347973.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79347973 = 29 ⋅2736137.

It is a cyclic number.

It is not a de Polignac number, because 37974397 - 2¹¹ = 37972349 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 37974397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37974317) 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, 149379 + ... + 149632.

It is an arithmetic number, because the mean of its divisors is an integer number (9568384).

Almost surely, 2^37974397 is an apocalyptic number.

It is an amenable number.

37974397 is a deficient number, since it is larger than the sum of its proper divisors (299139).

37974397 is a wasteful number, since it uses less digits than its factorization.

37974397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299138.

The product of its digits is 1000188, while the sum is 49.

The square root of 37974397 is about 6162.3369755313. The cubic root of 37974397 is about 336.1220178770.

The spelling of 37974397 in words is "thirty-seven million, nine hundred seventy-four thousand, three hundred ninety-seven".