245172047 has 2 divisors, whose sum is σ = 245172048. Its totient is φ = 245172046.

The previous prime is 245172041. The next prime is 245172071. The reversal of 245172047 is 740271542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245172047 - 2¹⁴ = 245155663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245172041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122586023 + 122586024.

It is an arithmetic number, because the mean of its divisors is an integer number (122586024).

Almost surely, 2^245172047 is an apocalyptic number.

245172047 is a deficient number, since it is larger than the sum of its proper divisors (1).

245172047 is an equidigital number, since it uses as much as digits as its factorization.

245172047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 245172047 is about 15657.9707178165. The cubic root of 245172047 is about 625.8789102209.

The spelling of 245172047 in words is "two hundred forty-five million, one hundred seventy-two thousand, forty-seven".