394722101 has 6 divisors (see below), whose sum is σ = 407866806. Its totient is φ = 381988200.

The previous prime is 394722077. The next prime is 394722137. The reversal of 394722101 is 101227493.

It can be written as a sum of positive squares in only one way, i.e., 290702500 + 104019601 = 17050^2 + 10199^2 .

It is not a de Polignac number, because 394722101 - 2¹⁸ = 394459957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394722151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204410 + ... + 206331.

It is an arithmetic number, because the mean of its divisors is an integer number (67977801).

Almost surely, 2^394722101 is an apocalyptic number.

394722101 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

394722101 is a deficient number, since it is larger than the sum of its proper divisors (13144705).

394722101 is an equidigital number, since it uses as much as digits as its factorization.

394722101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410803 (or 410772 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 394722101 is about 19867.6143761650. The cubic root of 394722101 is about 733.5512834042.

Adding to 394722101 its reverse (101227493), we get a palindrome (495949594).

The spelling of 394722101 in words is "three hundred ninety-four million, seven hundred twenty-two thousand, one hundred one".