70261391 has 6 divisors (see below), whose sum is σ = 74637840. Its totient is φ = 66128096.

The previous prime is 70261379. The next prime is 70261393. The reversal of 70261391 is 19316207.

It is not a de Polignac number, because 70261391 - 2¹⁰ = 70260367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70261393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121271 + ... + 121848.

It is an arithmetic number, because the mean of its divisors is an integer number (12439640).

Almost surely, 2^70261391 is an apocalyptic number.

70261391 is a deficient number, since it is larger than the sum of its proper divisors (4376449).

70261391 is a wasteful number, since it uses less digits than its factorization.

70261391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243153 (or 243136 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 70261391 is about 8382.2068096653. The cubic root of 70261391 is about 412.6408770123.

Adding to 70261391 its reverse (19316207), we get a palindrome (89577598).

The spelling of 70261391 in words is "seventy million, two hundred sixty-one thousand, three hundred ninety-one".