394437734493 has 16 divisors (see below), whose sum is σ = 573980577600. Its totient is φ = 238947770880.

The previous prime is 394437734461. The next prime is 394437734503.

394437734493 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 394437734493 - 2⁵ = 394437734461 is a prime.

It is a super-2 number, since 2×394437734493² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394437734413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2559028 + ... + 2708781.

It is an arithmetic number, because the mean of its divisors is an integer number (35873786100).

Almost surely, 2^394437734493 is an apocalyptic number.

394437734493 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

394437734493 is a deficient number, since it is larger than the sum of its proper divisors (179542843107).

394437734493 is a wasteful number, since it uses less digits than its factorization.

394437734493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5270092.

The product of its digits is 82301184, while the sum is 60.

The spelling of 394437734493 in words is "three hundred ninety-four billion, four hundred thirty-seven million, seven hundred thirty-four thousand, four hundred ninety-three".