70687799 has 12 divisors (see below), whose sum is σ = 87479856. Its totient is φ = 55927872.

The previous prime is 70687783. The next prime is 70687807. The reversal of 70687799 is 99778607.

It is a happy number.

It is not a de Polignac number, because 70687799 - 2⁴ = 70687783 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 70687799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70687709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28694 + ... + 31059.

It is an arithmetic number, because the mean of its divisors is an integer number (7289988).

Almost surely, 2^70687799 is an apocalyptic number.

70687799 is a deficient number, since it is larger than the sum of its proper divisors (16792057).

70687799 is a wasteful number, since it uses less digits than its factorization.

70687799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59786 (or 59773 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 53.

The square root of 70687799 is about 8407.6036419422. The cubic root of 70687799 is about 413.4739500898.

The spelling of 70687799 in words is "seventy million, six hundred eighty-seven thousand, seven hundred ninety-nine".