97213785 has 32 divisors (see below), whose sum is σ = 164367360. Its totient is φ = 48927168.

The previous prime is 97213783. The next prime is 97213793. The reversal of 97213785 is 58731279.

It is not a de Polignac number, because 97213785 - 2¹ = 97213783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97213783) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98404 + ... + 99386.

It is an arithmetic number, because the mean of its divisors is an integer number (5136480).

Almost surely, 2^97213785 is an apocalyptic number.

97213785 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

97213785 is a deficient number, since it is larger than the sum of its proper divisors (67153575).

97213785 is a wasteful number, since it uses less digits than its factorization.

97213785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357.

The product of its digits is 105840, while the sum is 42.

The square root of 97213785 is about 9859.7051172943. The cubic root of 97213785 is about 459.8073941608.

The spelling of 97213785 in words is "ninety-seven million, two hundred thirteen thousand, seven hundred eighty-five".