247972797 has 24 divisors (see below), whose sum is σ = 367960320. Its totient is φ = 160825920.

The previous prime is 247972783. The next prime is 247972801. The reversal of 247972797 is 797279742.

It is not a de Polignac number, because 247972797 - 2¹⁸ = 247710653 is a prime.

It is a super-2 number, since 2×247972797² = 122981016104006418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247972717) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 171604 + ... + 173042.

It is an arithmetic number, because the mean of its divisors is an integer number (15331680).

Almost surely, 2^247972797 is an apocalyptic number.

It is an amenable number.

247972797 is a deficient number, since it is larger than the sum of its proper divisors (119987523).

247972797 is a wasteful number, since it uses less digits than its factorization.

247972797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953 (or 1950 counting only the distinct ones).

The product of its digits is 3111696, while the sum is 54.

The square root of 247972797 is about 15747.1520282240. The cubic root of 247972797 is about 628.2531578701.

The spelling of 247972797 in words is "two hundred forty-seven million, nine hundred seventy-two thousand, seven hundred ninety-seven".