513037946 has 4 divisors (see below), whose sum is σ = 769556922. Its totient is φ = 256518972.

The previous prime is 513037937. The next prime is 513037949. The reversal of 513037946 is 649730315.

It is a happy number.

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., 443565721 + 69472225 = 21061^2 + 8335^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (513037949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128259485 + ... + 128259488.

Almost surely, 2^513037946 is an apocalyptic number.

513037946 is a deficient number, since it is larger than the sum of its proper divisors (256518976).

513037946 is a wasteful number, since it uses less digits than its factorization.

513037946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256518975.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 513037946 is about 22650.3409687360. The cubic root of 513037946 is about 800.5402319796.

The spelling of 513037946 in words is "five hundred thirteen million, thirty-seven thousand, nine hundred forty-six".