374651621 has 4 divisors (see below), whose sum is σ = 375371244. Its totient is φ = 373932000.

The previous prime is 374651591. The next prime is 374651659. The reversal of 374651621 is 126156473.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126156473 = 17 ⋅7420969.

It can be written as a sum of positive squares in 2 ways, for example, as 180606721 + 194044900 = 13439^2 + 13930^2 .

It is a cyclic number.

It is not a de Polignac number, because 374651621 - 2¹⁰ = 374650597 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 (374650621) 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, 359030 + ... + 360071.

It is an arithmetic number, because the mean of its divisors is an integer number (93842811).

Almost surely, 2^374651621 is an apocalyptic number.

It is an amenable number.

374651621 is a deficient number, since it is larger than the sum of its proper divisors (719623).

374651621 is an equidigital number, since it uses as much as digits as its factorization.

374651621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719622.

The product of its digits is 30240, while the sum is 35.

The square root of 374651621 is about 19355.9195338274. The cubic root of 374651621 is about 720.9014050928.

The spelling of 374651621 in words is "three hundred seventy-four million, six hundred fifty-one thousand, six hundred twenty-one".