70387804249 has 27 divisors (see below), whose sum is σ = 82755228213. Its totient is φ = 59694075000.

The previous prime is 70387804243. The next prime is 70387804351. The reversal of 70387804249 is 94240878307.

The square root of 70387804249 is 265307.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 70387804249 - 2³¹ = 68240320601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70387804196 and 70387804205.

It is not an unprimeable number, because it can be changed into a prime (70387804243) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 280429374 + ... + 280429624.

Almost surely, 2^70387804249 is an apocalyptic number.

70387804249 is the 265307-th square number.

70387804249 is the 132654-th centered octagonal number.

It is an amenable number.

70387804249 is a deficient number, since it is larger than the sum of its proper divisors (12367423964).

70387804249 is an frugal number, since it uses more digits than its factorization.

70387804249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 70387804249 in words is "seventy billion, three hundred eighty-seven million, eight hundred four thousand, two hundred forty-nine".