70444631 has 4 divisors (see below), whose sum is σ = 70517712. Its totient is φ = 70371552.

The previous prime is 70444613. The next prime is 70444637. The reversal of 70444631 is 13644407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13644407 = 7 ⋅1949201.

It is a cyclic number.

It is not a de Polignac number, because 70444631 - 2¹⁸ = 70182487 is a prime.

It is a super-2 number, since 2×70444631² = 9924892073452322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70444594 and 70444603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70444637) 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, 35075 + ... + 37028.

It is an arithmetic number, because the mean of its divisors is an integer number (17629428).

Almost surely, 2^70444631 is an apocalyptic number.

70444631 is a deficient number, since it is larger than the sum of its proper divisors (73081).

70444631 is an equidigital number, since it uses as much as digits as its factorization.

70444631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73080.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 70444631 is about 8393.1299882702. The cubic root of 70444631 is about 412.9992847457. Note that the first 3 decimals are identical.

The spelling of 70444631 in words is "seventy million, four hundred forty-four thousand, six hundred thirty-one".