70923987 has 24 divisors (see below), whose sum is σ = 105670656. Its totient is φ = 45814896.

The previous prime is 70923977. The next prime is 70924031. The reversal of 70923987 is 78932907.

It is not a de Polignac number, because 70923987 - 2⁴ = 70923971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70923947) 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, 44478 + ... + 46044.

It is an arithmetic number, because the mean of its divisors is an integer number (4402944).

Almost surely, 2^70923987 is an apocalyptic number.

70923987 is a deficient number, since it is larger than the sum of its proper divisors (34746669).

70923987 is a wasteful number, since it uses less digits than its factorization.

70923987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727 (or 1724 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 70923987 is about 8421.6380235676. The cubic root of 70923987 is about 413.9339494151.

The spelling of 70923987 in words is "seventy million, nine hundred twenty-three thousand, nine hundred eighty-seven".