391629301442 has 8 divisors (see below), whose sum is σ = 587450461500. Its totient is φ = 195812480944.

The previous prime is 391629301429. The next prime is 391629301447. The reversal of 391629301442 is 244103926193.

It can be written as a sum of positive squares in 2 ways, for example, as 356517662281 + 35111639161 = 597091^2 + 187381^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 391629301393 and 391629301402.

It is not an unprimeable number, because it can be changed into a prime (391629301447) 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, 849017 + ... + 1226412.

Almost surely, 2^391629301442 is an apocalyptic number.

391629301442 is a deficient number, since it is larger than the sum of its proper divisors (195821160058).

391629301442 is a wasteful number, since it uses less digits than its factorization.

391629301442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169780.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 391629301442 in words is "three hundred ninety-one billion, six hundred twenty-nine million, three hundred one thousand, four hundred forty-two".