70913909 has 16 divisors (see below), whose sum is σ = 81768960. Its totient is φ = 60822000.

The previous prime is 70913897. The next prime is 70913933. The reversal of 70913909 is 90931907.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 70913909 - 2¹⁶ = 70848373 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 (70912909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64454 + ... + 65544.

It is an arithmetic number, because the mean of its divisors is an integer number (5110560).

Almost surely, 2^70913909 is an apocalyptic number.

It is an amenable number.

70913909 is a deficient number, since it is larger than the sum of its proper divisors (10855051).

70913909 is a wasteful number, since it uses less digits than its factorization.

70913909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432.

The product of its (nonzero) digits is 15309, while the sum is 38.

The square root of 70913909 is about 8421.0396626545. The cubic root of 70913909 is about 413.9143423958.

The spelling of 70913909 in words is "seventy million, nine hundred thirteen thousand, nine hundred nine".