72870047 has 2 divisors, whose sum is σ = 72870048. Its totient is φ = 72870046.

The previous prime is 72870029. The next prime is 72870101. The reversal of 72870047 is 74007827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72870047 - 2¹⁰ = 72869023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72869989 and 72870016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72870247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36435023 + 36435024.

It is an arithmetic number, because the mean of its divisors is an integer number (36435024).

Almost surely, 2^72870047 is an apocalyptic number.

72870047 is a deficient number, since it is larger than the sum of its proper divisors (1).

72870047 is an equidigital number, since it uses as much as digits as its factorization.

72870047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21952, while the sum is 35.

The square root of 72870047 is about 8536.3954336711. The cubic root of 72870047 is about 417.6857733971.

The spelling of 72870047 in words is "seventy-two million, eight hundred seventy thousand, forty-seven".