3937429 has 4 divisors (see below), whose sum is σ = 4043884. Its totient is φ = 3830976.

The previous prime is 3937411. The next prime is 3937469. The reversal of 3937429 is 9247393.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9247393 = 31 ⋅298303.

It can be written as a sum of positive squares in 2 ways, for example, as 3294225 + 643204 = 1815^2 + 802^2 .

It is a cyclic number.

It is not a de Polignac number, because 3937429 - 2⁵ = 3937397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 106417 = 3937429 / (3 + 9 + 3 + 7 + 4 + 2 + 9).

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3937469) 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, 53172 + ... + 53245.

It is an arithmetic number, because the mean of its divisors is an integer number (1010971).

Almost surely, 2^3937429 is an apocalyptic number.

It is an amenable number.

3937429 is a deficient number, since it is larger than the sum of its proper divisors (106455).

3937429 is a wasteful number, since it uses less digits than its factorization.

3937429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106454.

The product of its digits is 40824, while the sum is 37.

The square root of 3937429 is about 1984.2955928994. The cubic root of 3937429 is about 157.9080408108.

The spelling of 3937429 in words is "three million, nine hundred thirty-seven thousand, four hundred twenty-nine".