70961519 has 4 divisors (see below), whose sum is σ = 75135744. Its totient is φ = 66787296.

The previous prime is 70961497. The next prime is 70961531. The reversal of 70961519 is 91516907.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70961519 - 2¹² = 70957423 is a prime.

It is a super-2 number, since 2×70961519² = 10071074357574722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70961549) 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, 2087087 + ... + 2087120.

It is an arithmetic number, because the mean of its divisors is an integer number (18783936).

Almost surely, 2^70961519 is an apocalyptic number.

70961519 is a deficient number, since it is larger than the sum of its proper divisors (4174225).

70961519 is a wasteful number, since it uses less digits than its factorization.

70961519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4174224.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 70961519 is about 8423.8660364467. The cubic root of 70961519 is about 414.0069525931.

The spelling of 70961519 in words is "seventy million, nine hundred sixty-one thousand, five hundred nineteen".