521703074 has 4 divisors (see below), whose sum is σ = 782554614. Its totient is φ = 260851536.

The previous prime is 521703073. The next prime is 521703107. The reversal of 521703074 is 470307125.

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., 517881049 + 3822025 = 22757^2 + 1955^2 .

It is not an unprimeable number, because it can be changed into a prime (521703073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130425767 + ... + 130425770.

Almost surely, 2^521703074 is an apocalyptic number.

521703074 is a deficient number, since it is larger than the sum of its proper divisors (260851540).

521703074 is a wasteful number, since it uses less digits than its factorization.

521703074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260851539.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 521703074 is about 22840.8203442871. The cubic root of 521703074 is about 805.0220916484.

The spelling of 521703074 in words is "five hundred twenty-one million, seven hundred three thousand, seventy-four".