70620551 has 2 divisors, whose sum is σ = 70620552. Its totient is φ = 70620550.

The previous prime is 70620541. The next prime is 70620569. The reversal of 70620551 is 15502607.

It is a weak prime.

It is an emirp because it is prime and its reverse (15502607) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70620551 - 2²² = 66426247 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70620551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70620541) by changing a digit.

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 as a sum of consecutive naturals, namely, 35310275 + 35310276.

It is an arithmetic number, because the mean of its divisors is an integer number (35310276).

Almost surely, 2^70620551 is an apocalyptic number.

70620551 is a deficient number, since it is larger than the sum of its proper divisors (1).

70620551 is an equidigital number, since it uses as much as digits as its factorization.

70620551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 70620551 is about 8403.6034532812. The cubic root of 70620551 is about 413.3427906409.

The spelling of 70620551 in words is "seventy million, six hundred twenty thousand, five hundred fifty-one".