70663631 has 2 divisors, whose sum is σ = 70663632. Its totient is φ = 70663630.

The previous prime is 70663591. The next prime is 70663643. The reversal of 70663631 is 13636607.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (13636607) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70663631 - 2¹⁰ = 70662607 is a prime.

It is a super-2 number, since 2×70663631² = 9986697492208322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70663331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35331815 + 35331816.

It is an arithmetic number, because the mean of its divisors is an integer number (35331816).

Almost surely, 2^70663631 is an apocalyptic number.

70663631 is a deficient number, since it is larger than the sum of its proper divisors (1).

70663631 is an equidigital number, since it uses as much as digits as its factorization.

70663631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 70663631 is about 8406.1662486534. The cubic root of 70663631 is about 413.4268227796.

The spelling of 70663631 in words is "seventy million, six hundred sixty-three thousand, six hundred thirty-one".