70738987 has 8 divisors (see below), whose sum is σ = 77236272. Its totient is φ = 64252800.

The previous prime is 70738979. The next prime is 70739021. The reversal of 70738987 is 78983707.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70738987 - 2³ = 70738979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70738987.

It is not an unprimeable number, because it can be changed into a prime (70738687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16287 + ... + 20167.

It is an arithmetic number, because the mean of its divisors is an integer number (9654534).

Almost surely, 2^70738987 is an apocalyptic number.

70738987 is a deficient number, since it is larger than the sum of its proper divisors (6497285).

70738987 is a wasteful number, since it uses less digits than its factorization.

70738987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5549.

The product of its (nonzero) digits is 592704, while the sum is 49.

The square root of 70738987 is about 8410.6472402545. The cubic root of 70738987 is about 413.5737306182.

The spelling of 70738987 in words is "seventy million, seven hundred thirty-eight thousand, nine hundred eighty-seven".