90307007 has 4 divisors (see below), whose sum is σ = 103208016. Its totient is φ = 77406000.

The previous prime is 90307003. The next prime is 90307027. The reversal of 90307007 is 70070309.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70070309 = 19 ⋅3687911.

It is not a de Polignac number, because 90307007 - 2² = 90307003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90307003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6450494 + ... + 6450507.

It is an arithmetic number, because the mean of its divisors is an integer number (25802004).

Almost surely, 2^90307007 is an apocalyptic number.

90307007 is a deficient number, since it is larger than the sum of its proper divisors (12901009).

90307007 is a wasteful number, since it uses less digits than its factorization.

90307007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12901008.

The product of its (nonzero) digits is 1323, while the sum is 26.

The square root of 90307007 is about 9502.9998947701. Note that the first 3 decimals coincide. The cubic root of 90307007 is about 448.6494602809.

The spelling of 90307007 in words is "ninety million, three hundred seven thousand, seven".