70813771 has 6 divisors (see below), whose sum is σ = 82375260. Its totient is φ = 60697476.

The previous prime is 70813763. The next prime is 70813781. The reversal of 70813771 is 17731807.

It is not a de Polignac number, because 70813771 - 2³ = 70813763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70813781) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 722541 + ... + 722638.

It is an arithmetic number, because the mean of its divisors is an integer number (13729210).

Almost surely, 2^70813771 is an apocalyptic number.

70813771 is a deficient number, since it is larger than the sum of its proper divisors (11561489).

70813771 is a wasteful number, since it uses less digits than its factorization.

70813771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445193 (or 1445186 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 34.

The square root of 70813771 is about 8415.0918592728. The cubic root of 70813771 is about 413.7194202230.

The spelling of 70813771 in words is "seventy million, eight hundred thirteen thousand, seven hundred seventy-one".