70919905 has 12 divisors (see below), whose sum is σ = 98998740. Its totient is φ = 48630624.

The previous prime is 70919897. The next prime is 70919923. The reversal of 70919905 is 50991907.

It can be written as a sum of positive squares in 2 ways, for example, as 56205009 + 14714896 = 7497^2 + 3836^2 .

It is not a de Polignac number, because 70919905 - 2³ = 70919897 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144490 + ... + 144979.

It is an arithmetic number, because the mean of its divisors is an integer number (8249895).

Almost surely, 2^70919905 is an apocalyptic number.

It is an amenable number.

70919905 is a deficient number, since it is larger than the sum of its proper divisors (28078835).

70919905 is a wasteful number, since it uses less digits than its factorization.

70919905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289488 (or 289481 counting only the distinct ones).

The product of its (nonzero) digits is 25515, while the sum is 40.

The square root of 70919905 is about 8421.3956681776. The cubic root of 70919905 is about 413.9260079984.

It can be divided in two parts, 70919 and 905, that added together give a square (71824 = 268²).

The spelling of 70919905 in words is "seventy million, nine hundred nineteen thousand, nine hundred five".