1617901942 has 4 divisors (see below), whose sum is σ = 2426852916. Its totient is φ = 808950970.

The previous prime is 1617901939. The next prime is 1617901979. The reversal of 1617901942 is 2491097161.

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

It is a junction number, because it is equal to n+sod(n) for n = 1617901895 and 1617901904.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404475484 + ... + 404475487.

It is an arithmetic number, because the mean of its divisors is an integer number (606713229).

Almost surely, 2^1617901942 is an apocalyptic number.

1617901942 is a deficient number, since it is larger than the sum of its proper divisors (808950974).

1617901942 is an equidigital number, since it uses as much as digits as its factorization.

1617901942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808950973.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1617901942 is about 40223.1518158386. The cubic root of 1617901942 is about 1173.9530597741.

The spelling of 1617901942 in words is "one billion, six hundred seventeen million, nine hundred one thousand, nine hundred forty-two".