70402987 has 2 divisors, whose sum is σ = 70402988. Its totient is φ = 70402986.

The previous prime is 70402979. The next prime is 70402993. The reversal of 70402987 is 78920407.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (78920407) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70402987 - 2³ = 70402979 is a prime.

It is not a weakly prime, because it can be changed into another prime (70402907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35201493 + 35201494.

It is an arithmetic number, because the mean of its divisors is an integer number (35201494).

Almost surely, 2^70402987 is an apocalyptic number.

70402987 is a deficient number, since it is larger than the sum of its proper divisors (1).

70402987 is an equidigital number, since it uses as much as digits as its factorization.

70402987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 70402987 is about 8390.6487830203. The cubic root of 70402987 is about 412.9178859119.

The spelling of 70402987 in words is "seventy million, four hundred two thousand, nine hundred eighty-seven".