87962921 has 2 divisors, whose sum is σ = 87962922. Its totient is φ = 87962920.

The previous prime is 87962911. The next prime is 87962933. The reversal of 87962921 is 12926978.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68293696 + 19669225 = 8264^2 + 4435^2 .

It is a cyclic number.

It is not a de Polignac number, because 87962921 - 2⁶ = 87962857 is a prime.

It is not a weakly prime, because it can be changed into another prime (87962911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43981460 + 43981461.

It is an arithmetic number, because the mean of its divisors is an integer number (43981461).

Almost surely, 2^87962921 is an apocalyptic number.

It is an amenable number.

87962921 is a deficient number, since it is larger than the sum of its proper divisors (1).

87962921 is an equidigital number, since it uses as much as digits as its factorization.

87962921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 44.

The square root of 87962921 is about 9378.8549940811. The cubic root of 87962921 is about 444.7335373999.

The spelling of 87962921 in words is "eighty-seven million, nine hundred sixty-two thousand, nine hundred twenty-one".