70981761 has 4 divisors (see below), whose sum is σ = 94642352. Its totient is φ = 47321172.

The previous prime is 70981759. The next prime is 70981789. The reversal of 70981761 is 16718907.

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.

It is not a de Polignac number, because 70981761 - 2¹ = 70981759 is a prime.

It is a super-2 number, since 2×70981761² = 10076820789322242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70981751) 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, 11830291 + ... + 11830296.

It is an arithmetic number, because the mean of its divisors is an integer number (23660588).

Almost surely, 2^70981761 is an apocalyptic number.

It is an amenable number.

70981761 is a deficient number, since it is larger than the sum of its proper divisors (23660591).

70981761 is a wasteful number, since it uses less digits than its factorization.

70981761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23660590.

The product of its (nonzero) digits is 21168, while the sum is 39.

The square root of 70981761 is about 8425.0674181279. The cubic root of 70981761 is about 414.0463144526.

The spelling of 70981761 in words is "seventy million, nine hundred eighty-one thousand, seven hundred sixty-one".