70567631 has 2 divisors, whose sum is σ = 70567632. Its totient is φ = 70567630.

The previous prime is 70567613. The next prime is 70567639. The reversal of 70567631 is 13676507.

Together with previous prime (70567613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70567631 is a prime.

It is a super-2 number, since 2×70567631² = 9959581089904322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70567591 and 70567600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70567639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35283815 + 35283816.

It is an arithmetic number, because the mean of its divisors is an integer number (35283816).

Almost surely, 2^70567631 is an apocalyptic number.

70567631 is a deficient number, since it is larger than the sum of its proper divisors (1).

70567631 is an equidigital number, since it uses as much as digits as its factorization.

70567631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 70567631 is about 8400.4542139101. The cubic root of 70567631 is about 413.2395177443.

The spelling of 70567631 in words is "seventy million, five hundred sixty-seven thousand, six hundred thirty-one".