408042743 has 4 divisors (see below), whose sum is σ = 408173808. Its totient is φ = 407911680.

The previous prime is 408042709. The next prime is 408042749. The reversal of 408042743 is 347240804.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 408042743 - 2⁸ = 408042487 is a prime.

It is a super-2 number, since 2×408042743² = 332997760229928098, 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 (408042749) 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, 60746 + ... + 67127.

It is an arithmetic number, because the mean of its divisors is an integer number (102043452).

Almost surely, 2^408042743 is an apocalyptic number.

408042743 is a deficient number, since it is larger than the sum of its proper divisors (131065).

408042743 is a wasteful number, since it uses less digits than its factorization.

408042743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131064.

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 408042743 is about 20200.0678959255. The cubic root of 408042743 is about 741.7118531798.

The spelling of 408042743 in words is "four hundred eight million, forty-two thousand, seven hundred forty-three".