247372534 has 4 divisors (see below), whose sum is σ = 371058804. Its totient is φ = 123686266.

The previous prime is 247372511. The next prime is 247372547. The reversal of 247372534 is 435273742.

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

It is a super-2 number, since 2×247372534² = 122386341155162312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247372493 and 247372502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61843132 + ... + 61843135.

It is an arithmetic number, because the mean of its divisors is an integer number (92764701).

Almost surely, 2^247372534 is an apocalyptic number.

247372534 is a deficient number, since it is larger than the sum of its proper divisors (123686270).

247372534 is a wasteful number, since it uses less digits than its factorization.

247372534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123686269.

The product of its digits is 141120, while the sum is 37.

The square root of 247372534 is about 15728.0810654065. The cubic root of 247372534 is about 627.7458148158.

The spelling of 247372534 in words is "two hundred forty-seven million, three hundred seventy-two thousand, five hundred thirty-four".