366689989 has 4 divisors (see below), whose sum is σ = 382633056. Its totient is φ = 350746924.

The previous prime is 366689977. The next prime is 366690001. The reversal of 366689989 is 989986663.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 989986663 = 103 ⋅9611521.

It is an interprime number because it is at equal distance from previous prime (366689977) and next prime (366690001).

It is a cyclic number.

It is not a de Polignac number, because 366689989 - 2²³ = 358301381 is a prime.

It is a super-3 number, since 3×366689989³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 366689989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (366689909) 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, 7971499 + ... + 7971544.

It is an arithmetic number, because the mean of its divisors is an integer number (95658264).

Almost surely, 2^366689989 is an apocalyptic number.

It is an amenable number.

366689989 is a deficient number, since it is larger than the sum of its proper divisors (15943067).

366689989 is a wasteful number, since it uses less digits than its factorization.

366689989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15943066.

The product of its digits is 30233088, while the sum is 64.

The square root of 366689989 is about 19149.1511300110. The cubic root of 366689989 is about 715.7582312889.

The spelling of 366689989 in words is "three hundred sixty-six million, six hundred eighty-nine thousand, nine hundred eighty-nine".