70725961 has 4 divisors (see below), whose sum is σ = 74448400. Its totient is φ = 67003524.

The previous prime is 70725959. The next prime is 70725971. The reversal of 70725961 is 16952707.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16952707 = 43 ⋅394249.

It is a cyclic number.

It is not a de Polignac number, because 70725961 - 2¹ = 70725959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70725961.

It is not an unprimeable number, because it can be changed into a prime (70725971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1861191 + ... + 1861228.

It is an arithmetic number, because the mean of its divisors is an integer number (18612100).

Almost surely, 2^70725961 is an apocalyptic number.

It is an amenable number.

70725961 is a deficient number, since it is larger than the sum of its proper divisors (3722439).

70725961 is a wasteful number, since it uses less digits than its factorization.

70725961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3722438.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 70725961 is about 8409.8728290028. The cubic root of 70725961 is about 413.5483436647.

The spelling of 70725961 in words is "seventy million, seven hundred twenty-five thousand, nine hundred sixty-one".