379689661 has 4 divisors (see below), whose sum is σ = 408896572. Its totient is φ = 350482752.

The previous prime is 379689659. The next prime is 379689689. The reversal of 379689661 is 166986973.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166986973 = 41 ⋅4072853.

It can be written as a sum of positive squares in 2 ways, for example, as 80192025 + 299497636 = 8955^2 + 17306^2 .

It is a cyclic number.

It is not a de Polignac number, because 379689661 - 2¹ = 379689659 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 (379689601) 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, 14603436 + ... + 14603461.

It is an arithmetic number, because the mean of its divisors is an integer number (102224143).

Almost surely, 2^379689661 is an apocalyptic number.

It is an amenable number.

379689661 is a deficient number, since it is larger than the sum of its proper divisors (29206911).

379689661 is a wasteful number, since it uses less digits than its factorization.

379689661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29206910.

The product of its digits is 2939328, while the sum is 55.

The square root of 379689661 is about 19485.6270363568. The cubic root of 379689661 is about 724.1184122278.

The spelling of 379689661 in words is "three hundred seventy-nine million, six hundred eighty-nine thousand, six hundred sixty-one".