70697749 has 4 divisors (see below), whose sum is σ = 70784064. Its totient is φ = 70611436.

The previous prime is 70697743. The next prime is 70697761. The reversal of 70697749 is 94779607.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 70697749 - 2³ = 70697741 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70697741) 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, 41917 + ... + 43570.

It is an arithmetic number, because the mean of its divisors is an integer number (17696016).

Almost surely, 2^70697749 is an apocalyptic number.

It is an amenable number.

70697749 is a deficient number, since it is larger than the sum of its proper divisors (86315).

70697749 is an equidigital number, since it uses as much as digits as its factorization.

70697749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86314.

The product of its (nonzero) digits is 666792, while the sum is 49.

The square root of 70697749 is about 8408.1953473977. The cubic root of 70697749 is about 413.4933493489.

The spelling of 70697749 in words is "seventy million, six hundred ninety-seven thousand, seven hundred forty-nine".