70744921 has 9 divisors (see below), whose sum is σ = 76724031. Its totient is φ = 65202072.

The previous prime is 70744907. The next prime is 70744931. The reversal of 70744921 is 12944707.

The square root of 70744921 is 8411.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10465225 + 60279696 = 3235^2 + 7764^2 .

It is not a de Polignac number, because 70744921 - 2¹¹ = 70742873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70744931) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 109020 + ... + 109666.

Almost surely, 2^70744921 is an apocalyptic number.

70744921 is the 8411-st square number.

70744921 is the 4206-th centered octagonal number.

It is an amenable number.

70744921 is a deficient number, since it is larger than the sum of its proper divisors (5979110).

70744921 is an frugal number, since it uses more digits than its factorization.

70744921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The cubic root of 70744921 is about 413.5852946227.

The spelling of 70744921 in words is "seventy million, seven hundred forty-four thousand, nine hundred twenty-one".