70721365 has 16 divisors (see below), whose sum is σ = 99703296. Its totient is φ = 47476800.

The previous prime is 70721359. The next prime is 70721407. The reversal of 70721365 is 56312707.

It is not a de Polignac number, because 70721365 - 2¹³ = 70713173 is a prime.

It is a super-2 number, since 2×70721365² = 10003022934926450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48741 + ... + 50170.

It is an arithmetic number, because the mean of its divisors is an integer number (6231456).

Almost surely, 2^70721365 is an apocalyptic number.

It is an amenable number.

70721365 is a deficient number, since it is larger than the sum of its proper divisors (28981931).

70721365 is a wasteful number, since it uses less digits than its factorization.

70721365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98940.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 70721365 is about 8409.5995742960. The cubic root of 70721365 is about 413.5393855710.

The spelling of 70721365 in words is "seventy million, seven hundred twenty-one thousand, three hundred sixty-five".