72070487 has 4 divisors (see below), whose sum is σ = 74018376. Its totient is φ = 70122600.

The previous prime is 72070459. The next prime is 72070499. The reversal of 72070487 is 78407027.

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

It is a cyclic number.

It is not a de Polignac number, because 72070487 - 2¹² = 72066391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72070417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 973889 + ... + 973962.

It is an arithmetic number, because the mean of its divisors is an integer number (18504594).

Almost surely, 2^72070487 is an apocalyptic number.

72070487 is a deficient number, since it is larger than the sum of its proper divisors (1947889).

72070487 is a wasteful number, since it uses less digits than its factorization.

72070487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947888.

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

The square root of 72070487 is about 8489.4338444916. The cubic root of 72070487 is about 416.1524785442.

The spelling of 72070487 in words is "seventy-two million, seventy thousand, four hundred eighty-seven".