76521901 has 2 divisors, whose sum is σ = 76521902. Its totient is φ = 76521900.

The previous prime is 76521889. The next prime is 76521937. The reversal of 76521901 is 10912567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57608100 + 18913801 = 7590^2 + 4349^2 .

It is an emirp because it is prime and its reverse (10912567) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76521901 - 2⁵ = 76521869 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76521941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38260950 + 38260951.

It is an arithmetic number, because the mean of its divisors is an integer number (38260951).

Almost surely, 2^76521901 is an apocalyptic number.

It is an amenable number.

76521901 is a deficient number, since it is larger than the sum of its proper divisors (1).

76521901 is an equidigital number, since it uses as much as digits as its factorization.

76521901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 76521901 is about 8747.6797495107. The cubic root of 76521901 is about 424.5497441478.

The spelling of 76521901 in words is "seventy-six million, five hundred twenty-one thousand, nine hundred one".