72097070 has 16 divisors (see below), whose sum is σ = 129953808. Its totient is φ = 28799040.

The previous prime is 72097061. The next prime is 72097079. The reversal of 72097070 is 7079027.

It is an interprime number because it is at equal distance from previous prime (72097061) and next prime (72097079).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72097079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3290 + ... + 12450.

It is an arithmetic number, because the mean of its divisors is an integer number (8122113).

Almost surely, 2^72097070 is an apocalyptic number.

72097070 is a deficient number, since it is larger than the sum of its proper divisors (57856738).

72097070 is a wasteful number, since it uses less digits than its factorization.

72097070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9955.

The product of its (nonzero) digits is 6174, while the sum is 32.

The square root of 72097070 is about 8490.9993522553. Note that the first 3 decimals coincide. The cubic root of 72097070 is about 416.2036378187.

The spelling of 72097070 in words is "seventy-two million, ninety-seven thousand, seventy".