621351674 has 4 divisors (see below), whose sum is σ = 932027514. Its totient is φ = 310675836.

The previous prime is 621351671. The next prime is 621351707. The reversal of 621351674 is 476153126.

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

It can be written as a sum of positive squares in only one way, i.e., 556629649 + 64722025 = 23593^2 + 8045^2 .

It is not an unprimeable number, because it can be changed into a prime (621351671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155337917 + ... + 155337920.

Almost surely, 2^621351674 is an apocalyptic number.

621351674 is a deficient number, since it is larger than the sum of its proper divisors (310675840).

621351674 is a wasteful number, since it uses less digits than its factorization.

621351674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310675839.

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

The square root of 621351674 is about 24926.9266858151. The cubic root of 621351674 is about 853.3211125298.

The spelling of 621351674 in words is "six hundred twenty-one million, three hundred fifty-one thousand, six hundred seventy-four".