70993919 has 4 divisors (see below), whose sum is σ = 72725520. Its totient is φ = 69262320.

The previous prime is 70993891. The next prime is 70993931. The reversal of 70993919 is 91939907.

It is a happy number.

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 70993919 - 2²⁴ = 54216703 is a prime.

It is a super-2 number, since 2×70993919² = 10080273069957122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70990919) 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, 865739 + ... + 865820.

It is an arithmetic number, because the mean of its divisors is an integer number (18181380).

Almost surely, 2^70993919 is an apocalyptic number.

70993919 is a deficient number, since it is larger than the sum of its proper divisors (1731601).

70993919 is a wasteful number, since it uses less digits than its factorization.

70993919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731600.

The product of its (nonzero) digits is 137781, while the sum is 47.

The square root of 70993919 is about 8425.7889244865. The cubic root of 70993919 is about 414.0699528617.

The spelling of 70993919 in words is "seventy million, nine hundred ninety-three thousand, nine hundred nineteen".