70741991 has 4 divisors (see below), whose sum is σ = 73181400. Its totient is φ = 68302584.

The previous prime is 70741987. The next prime is 70742033. The reversal of 70741991 is 19914707.

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 70741991 - 2² = 70741987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70741961) 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, 1219661 + ... + 1219718.

It is an arithmetic number, because the mean of its divisors is an integer number (18295350).

Almost surely, 2^70741991 is an apocalyptic number.

70741991 is a deficient number, since it is larger than the sum of its proper divisors (2439409).

70741991 is a wasteful number, since it uses less digits than its factorization.

70741991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439408.

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 70741991 is about 8410.8258215231. The cubic root of 70741991 is about 413.5795848058.

The spelling of 70741991 in words is "seventy million, seven hundred forty-one thousand, nine hundred ninety-one".