71623153 has 6 divisors (see below), whose sum is σ = 83316786. Its totient is φ = 61391232.

The previous prime is 71623121. The next prime is 71623163. The reversal of 71623153 is 35132617.

It can be written as a sum of positive squares in only one way, i.e., 71622369 + 784 = 8463^2 + 28^2 .

It is not a de Polignac number, because 71623153 - 2⁵ = 71623121 is a prime.

It is a super-2 number, since 2×71623153² = 10259752091322818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71623163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 730800 + ... + 730897.

It is an arithmetic number, because the mean of its divisors is an integer number (13886131).

Almost surely, 2^71623153 is an apocalyptic number.

It is an amenable number.

71623153 is a deficient number, since it is larger than the sum of its proper divisors (11693633).

71623153 is a wasteful number, since it uses less digits than its factorization.

71623153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461711 (or 1461704 counting only the distinct ones).

The product of its digits is 3780, while the sum is 28.

The square root of 71623153 is about 8463.0463191454. The cubic root of 71623153 is about 415.2896859686.

The spelling of 71623153 in words is "seventy-one million, six hundred twenty-three thousand, one hundred fifty-three".