303401661 has 16 divisors (see below), whose sum is σ = 411345600. Its totient is φ = 198874368.

The previous prime is 303401647. The next prime is 303401663. The reversal of 303401661 is 166104303.

It is not a de Polignac number, because 303401661 - 2²² = 299207357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (303401663) 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, 141445 + ... + 143573.

It is an arithmetic number, because the mean of its divisors is an integer number (25709100).

Almost surely, 2^303401661 is an apocalyptic number.

It is an amenable number.

303401661 is a deficient number, since it is larger than the sum of its proper divisors (107943939).

303401661 is a wasteful number, since it uses less digits than its factorization.

303401661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 303401661 is about 17418.4287752943. The cubic root of 303401661 is about 671.9536510515.

Adding to 303401661 its reverse (166104303), we get a palindrome (469505964).

The spelling of 303401661 in words is "three hundred three million, four hundred one thousand, six hundred sixty-one".