70621547 has 2 divisors, whose sum is σ = 70621548. Its totient is φ = 70621546.

The previous prime is 70621513. The next prime is 70621559. The reversal of 70621547 is 74512607.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70621547 - 2¹⁴ = 70605163 is a prime.

It is not a weakly prime, because it can be changed into another prime (70621597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35310773 + 35310774.

It is an arithmetic number, because the mean of its divisors is an integer number (35310774).

Almost surely, 2^70621547 is an apocalyptic number.

70621547 is a deficient number, since it is larger than the sum of its proper divisors (1).

70621547 is an equidigital number, since it uses as much as digits as its factorization.

70621547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 70621547 is about 8403.6627133649. The cubic root of 70621547 is about 413.3447338311.

The spelling of 70621547 in words is "seventy million, six hundred twenty-one thousand, five hundred forty-seven".