70990355 has 4 divisors (see below), whose sum is σ = 85188432. Its totient is φ = 56792280.

The previous prime is 70990343. The next prime is 70990363. The reversal of 70990355 is 55309907.

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

It is not a de Polignac number, because 70990355 - 2¹² = 70986259 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7099031 + ... + 7099040.

It is an arithmetic number, because the mean of its divisors is an integer number (21297108).

Almost surely, 2^70990355 is an apocalyptic number.

70990355 is a deficient number, since it is larger than the sum of its proper divisors (14198077).

70990355 is a wasteful number, since it uses less digits than its factorization.

70990355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14198076.

The product of its (nonzero) digits is 42525, while the sum is 38.

The square root of 70990355 is about 8425.5774282835. The cubic root of 70990355 is about 414.0630237705.

It can be divided in two parts, 70990 and 355, that multiplied together give a triangular number (25201450 = T₇₀₉₉).

The spelling of 70990355 in words is "seventy million, nine hundred ninety thousand, three hundred fifty-five".