87400051 has 2 divisors, whose sum is σ = 87400052. Its totient is φ = 87400050.

The previous prime is 87400039. The next prime is 87400073. The reversal of 87400051 is 15000478.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87400051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87399989 and 87400025.

It is not a weakly prime, because it can be changed into another prime (87400081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43700025 + 43700026.

It is an arithmetic number, because the mean of its divisors is an integer number (43700026).

Almost surely, 2^87400051 is an apocalyptic number.

87400051 is a deficient number, since it is larger than the sum of its proper divisors (1).

87400051 is an equidigital number, since it uses as much as digits as its factorization.

87400051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 87400051 is about 9348.7994416396. The cubic root of 87400051 is about 443.7828981495.

The spelling of 87400051 in words is "eighty-seven million, four hundred thousand, fifty-one".